The mineral stibnite, antimony(iii) sulfide, is treated with hydrochloric acid to give antimony(iii) chloride and hydrogen sulfide gas. Mass of sbcl3 is produced from a 3.05 g sample of stibnite will be 4.50 g.
Antimony(III) sulfide + hydrochloric acid → antimony(III) chloride and hydrogen sulfide gas.
Sb₂S₃ + HCl → SbCl₃ + H₂S
Sb₂S₃ + 6HCl → 2SbCl₃ +3H₂S
1 mol Sb₂S₃ : 2SbCl₃
Molar mass Sb₂S₃ = 339.715 g/mol
Number of moles = mass in grams / molar mass = 3.35 g / 339.715 g/mol = 0.00986 mol
1 mol Sb₂S₃ / 2 mol SbCl₃ = 0.00986 mol Sb₂S₃ / x
x = 0.01972 mol SbCl₃
Molar mass SbCl₃ = 228.13 g/mol
mass in grams = molar mass × number of moles = 228.13 g/mol × 0.01972 mol = 4.50 g.
In the food, textile, metal, and rubber sectors, hydrogen chloride (HCl) is frequently employed as a bleaching agent to neutralise alkaline substances. When discharged into the soil, it is neutralised, and when it comes into contact with water, it hydrolyzes quickly.
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What is Ecosistema Lentico?
Hello..!
¿What is Ecosistema Lentico?
It is one that presents a closed structure and that its waters are permanently stagnant.
Are:
LakesLagoonsSwampsWetlandsAnswer:
Lentic Ecosystem
Explanation:
select all that apply select all the options that correctly describe the bond angles associated with each electron-domain geometry.
Bond angles also have an effect on the structure of molecules. Bond angles are the angles that connect adjacent lines to form bonds. The bond angle can be used to differentiate between linear, trigonal planar, tetraheral, trigonal-bipyramidal, and octahedral structures.
What is the tetrahedral geometry's electron domain angle?Thus, the molecular structure is bent at an angle just shy of 109.5° and the electron-pair geometry is tetrahedral.
Which five domains are there?The first four domains—Nutrition, Environment, Health, and Behavior—all contribute to our understanding of the animal's diverse experiences, which comprise the fifth domain, the Mental Domain.
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question:-
Select all that apply select all the options that correctly describe the bond angles associated with each electron-domain geometry?
a: The trigonal bipyramidal system has two different bond angles.
b: A species with 3 electron domains will exhibit an ideal bond angle of 120o.
c: A bond angle of 180o is observed for a linear system.
the area where it's most likely that electrons will be detected (bonding and nonbonding). One portion of an electrons domain is represented by a lone pair, singles, doubles, and triple bond.
How many domains of electrons are there?Two categories of electron domains exist: 1) A bound atom, and 2) an electron pair that is not ponding. All bonded atoms count as one electrons domain on the center atom, regardless of whether they are connected by a single, double, or triple bond. There are five fundamental geometries for electron domains.
What is the shape of an electron domain?Geometries of the electron domain. The five shapes that molecules can have in their electron domain geometries are linear, tetrahedral, triangular planar, triangular bipyramidal, and octahedral. Both the geometries and the forms of molecules exhibit many exceptions. They could be twisted, T-shaped, square planar, etc.
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During which changes of state do atoms that cannot move past one another become free to move?vaporization and sublimationboiling and depositionsublimation and meltingcondensation and melting.
Atoms that are unable to pass one another become free to migrate during state shifts such as sublimation and melting. While atoms also have a tendency to clash when a solid material melts.
This allows them to slip past one another. As a result, we may say that as an object melts or sublimation, its state changes, allowing atoms that can't travel past one another to do so. A substance can transfer directly from the solid to the gas state through sublimation, bypassing the liquid step. A substance can change its phase from a solid to a liquid by the physical process of melting or fusion. When the solid's internal energy increases, usually as a result of the application of heat causes melting.
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what quantities can be calculated from the bohr equation for the energy levels of the hydrogen atom? select all that apply.
The Bohr equation for energy levels of the hydrogen atom can be used to calculate the wavelength of a spectral line, to ionize hydrogen atom and to find the energy exchange of the electrons revolving between two levels.
What is Bohr's atomic theory?
In 1913, Neil Bohr presented his atomic theory called 'Bohr's atomic theory'. It was the first model that described the atomic hydrogen spectrum accurately along with wavelength.
Moreover, the theory indicates that the electron move in fixed circular orbits around the nucleus in an atom and there are no chances of electron finding in between the shells. The formula for Bohr's atomic model is l = nh/2π
To put it simply, in an atom, each orbit has its own specific energy and are commonly called energy levels or energy shells.
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What layer of earth is liquid with the highest density?.
Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Therefore, earth's core is the layer of earth is liquid with the highest density.
What is matter?Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.
Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.
The liquid layer of the Earth's core, made of iron and nickel, that lies beneath the Mantle and surrounds the inner Core.
Therefore, earth's core is the layer of earth is liquid with the highest density.
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How do you make chocolate not melt on your hands?.
The steps to make chocolate so that it does not melt on my hands are: heat the chocolate up to 120 degree fahrenheit and then after removing the bowl cool down it below 80 degree fahrenheit.
The main reasons to temper chocolate are:
1. Tempered chocolate is firm and solid in nature at room temperature. This is critical when making the chocolate confections or decorations. Chocolate which is out of temper requires refrigeration to maintain its shape.
2. The appearance of tempered chocolate is much better than that of its un-tempered counterpart. Tempered chocolate is smooth in nature , shiny and evenly colored.
3. Chocolate that is not been tempered has a distinctly dull appearance and may develop fat bloom -- grayish-white spots on the surface of the chocolate where unstable beta crystals have gathered.
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Select the correct answer. which of these actions is an example of chemical weathering? a. freezing water widens the cracks in rocks. b. plant roots force their way into cracks in rocks and break them. c. oxygen in air reacts with iron content in rocks, causing them to change color. d. strong winds peel soft rock away, leaving harder rock behind.
Which of these actions is an example of chemical weathering?
a. freezing water widens the cracks in rocks.
b. plant roots force their way into cracks in rocks and break them.
c. oxygen in air reacts with iron content in rocks, causing them to change color.
d. strong winds peel soft rock away, leaving harder rock behind.
Compare the structures of the nitrate ion and carbonate ion, paying close attention to the total number of valence electrons and atoms in each. Using this information, would you expect the structure of aluminium chloride (AlCl3) to be more like that of the carbonate ion or the chlorate ion? Explain.
The bonding in the aluminum chloride is closer to that of the chlorate ion in structure.
What are the structures of the nitrate and the carbonate ions?We know that sometimes, we can not be able to describe the properties of a compound or an ion or indeed any kind of chemical specie by just a single chemical structure. In that case, we would have to have recourse to a mix of structures that are able to show how the specie can be able to participate in a chemical reaction.
A close look at the carbonate ion and the nitrate ion would show us that the charge that is carried by the specie is delocalized over a number of atoms and such we can not be able to use only a single structure to explain the bonding that occurs in the ions.
On the other hand, the aluminium chloride is a compound that is ionic in nature. The bonding in the compound would look more like that of the chlorate ion which does not have the same molecular complexity as does the carbonate ion.
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Which set of items listed can be arranged to transform chemical energy into mechanical energy?.
The set of items listed which can transform the chemical energy into the mechanical energy is the battery, wire, fan blades turning.
The chemical energy of the item is transformed into the mechanical energy by the arrangement of batteries, wire, and fan blades turning. In the wire, the movement of ion is observed, which causes the movement of fan blades. And this turning of fan blades convert chemical energy to mechanical energy.
In the engine combustion, chemical energy is first converted to heat energy, which causes the expansion of a fluid into a motion. In the contrast, motor proteins convert chemical energy in the molecule to the useful mechanical work.
Therefore, the set of items listed which can transform the chemical energy into the mechanical energy is the battery, wire, fan blades turning. Hence, option c is correct.
Your question is incomplete. The complete question is
Which set of items listed can be arranged to transform chemical energy into mechanical energy?
A. motor, fan blades turning, wire
B. magnet, wire, fan blades turning
C. battery, wire, fan blades turning
D. battery, magnet, heat
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A mixture of nitrogen, oxygen, fluorine, and neon are in a container which has a tiny, tiny pinhole leak. Which element leaks the slowest from the container?.
A mixture of nitrogen, oxygen, fluorine, and neon are in a container which has a tiny, tiny pinhole leak. The element leaks the slowest from the container is fluorine.
The effusion of gas is expressed as follows :
rate ∝ 1 / √M
rate of effusion is inversely proportional to the square root of molecular weight.
molecular weight of nitrogen = 14amu
molecular weight of oxygen = 16 amu
molecular weight of fluorine = 19 amu
the rate of effusion with increase of molecular weight. so the elements leaks the slowest from the container is fluorine.
Thus, A mixture of nitrogen, oxygen, fluorine, and neon are in a container which has a tiny, tiny pinhole leak. The element leaks the slowest from the container is
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Determine the number of atoms of Nitrogen for each chemical formula
help!
Answer: C0- 1 copper atom, 2 nitrogen, 6 oxygen atoms.
(NH4)3PO4- 12 atoms of hydrogen, three atoms of nitrogen, one atom of phosphorus, and four atoms of oxygen
NH42Cr- 1 molecule of ammonium dichromate,
AlNO3- a-1 n-3 o-9
NH4NO3- n- 2 h-4 o-3
Explanation:
How many calories are needed to convert 1 g of liquid water at 10°c to solid ice at 0°c?.
80 calories are required to melt 1 gram of ice. (The energy required to elevate one gram of water by one degree Celsius is one calorie.) - The solidification process is what turns liquid into ice. 80 calories per gram will be released throughout this procedure.
What is the underlying concept here?This issue is meant to provide you an estimate of the amount of heat required per gram of solid water, or ice, in order for a solid to liquid phase change to occur. Simply put, a measurement of the amount of heat needed to melt one kilogram of ice at its typical melting point of 0 degrees Celsius is provided. Therefore, you could conclude that 80cal/g is similar to 80cal of It took 0C of heat to turn 1 g of ice from a solid to a liquid. Thus, 3 g of ice would require 3 g x 8 cal / 1 g / 240 cal. So, keep in mind this notation. 80cal per gram. g1means that by applying 80cal of heat, every 1 g of ice at 0°C can be transformed into liquid water at 0°C.
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hydrogen, , is used as a rocket fuel. the hydrogen is burned in oxygen to produce water vapor. what is the enthalpy change per kilogram of hydrogen?
The enthalpy change per kilogram of hydrogen is -120 kJ/ g H2
What is enthalpy of a reaction?
A chemical reaction's change in enthalpy that takes place under a constant pressure is known as the "heat of reaction" or "enthalpy of reaction." It is a helpful thermodynamic unit of measurement for figuring out how much energy per mole is emitted or created during a reaction. Enthalpy is a state function as well because it is created by pressure, volume, and internal energy, all of which are state functions.
The reaction is,
2H2(g)+O2(g) = 2H2O(g) H=-484 kJ
The molar weight of hydrogen, which is represented in the equation as H2, is 2.02 g/mol. According to the equation, 2 mol of H2 produce 484 kJ of heat. The heat evolved per gram of hydrogen is calculated by dividing this by the 2 mol H2 and the 2.02 g/mol H2:
(-484 kJ/2 mol H2)(1 mol H2/2.92 g H2) = -120. kJ/g H2
Hence, the enthalpy change per kilogram of hydrogen is -120 kJ/ g H2
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You breathe out 5.67 x 10^23 molecules of carbon dioxide. How many grams of gas is this?
5.67 x 10²³ molecules of carbon dioxide contain 38.7g of gas.
What is carbon dioxide ?One carbon atom is covalently doubly linked to two oxygen atoms in each of the molecules that make up carbon dioxide. At room temperature, it exists as a gas. In the atmosphere, carbon dioxide serves as a greenhouse gas because it absorbs infrared radiation despite being transparent to visible light.
Carbon dioxide is used as a refrigerant, in fire extinguishers, to blow coal, foam rubber and plastics, inflate life rafts and life jackets, blast coal, promote plant growth in greenhouses, immobilize animals before slaughter, and in carbonated drinks.
1 mole of ( 6.023 × 10²³ molecules ) of Co₂ is 44g
Then, 5.67 x 10²³ molecules of contain 38.7gm of gas
Thus, 5.67 x 10²³ molecules of Co₂ contain 38.7g.
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What are the 3 main features of a eukaryotic cell?.
Eukaryotic cells, in contrast to prokaryotic cells, have a membrane-bound nucleus. multiple rod-shaped chromosomes, a large number of membrane-bound organelles, including the golgi apparatus.
What is a eukaryotic cell example?Eukaryotic cells are distinguished by their membrane-enclosed organelles and organized nucleus. Plants, animals, fungus, and protists are a few examples of eukaryotic cells. Their genetic material is organized by chromosomes.
What is a eukaryotic cell's primary purpose?Within eukaryotes, organelles perform specialized tasks such power generation, photosynthesis, and membrane synthesis. The majority of them are membrane-bound organelles that serve as the locations of particular metabolic reactions. The presence of a nucleus encircled by a sophisticated nuclear membrane characterizes eukaryotic cells.
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Billy drops a baseball out of the window of his apartment at what point does the ball have the most kinetic energy?
(A) before he drops it
(B) halfway to the ground
(C) right as he drops it
(D) right before it hits the ground
An example of a molecule that cannot be represented adequately by a single lewis structure is?.
An example of molecule that cannot be represented by a single Lewis structure is Ozone (O₃).
A Lewis Structure may be defined as the representation of electrons of an atom with the help of dots and symbols. The symbols are used for representing initials of atom and dots are used for electrons. If there is a molecule, which is to be represented as Lewis's structure, then the bonds are shown with the help of straight line. However, there are some atoms which cannot be represented by a single Lewis structure. For those atoms different resonating structures are drawn. Resonating structures are different Lewis structures f similar molecule or atom in which delocalization of electrons takes place. These structures are drawn because a single Lewis structure is unable to explain all the properties of the molecule.
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Which are associated with nuclear fission but are not associated with nuclear fusion? check all that apply.
Neutrons striking nuclei
A single large nucleus breaking apart
Two small nuclei forming
When a large, unstable nucleus absorbs a slow-moving neutron, it splits into two smaller nuclei and additional neutrons, which is known as nuclear fission.
The mass difference between the starting nucleus and the end product, which occurs during the process, is transformed into a significant amount of energy using Einstein's equation:
E = Δmc²
When two tiny nuclei come together to form a bigger nucleus, nuclear fusion takes place.Because the final nucleus' mass is less than the sum of the original nuclei's masses during the process, Einstein's equation states that this mass difference is transformed into a significant amount of energy:
E = Δmc²
Now that we have examined each claim, we can determine which one solely applies to nuclear fission: nuclear fission is the only process that results from neutrons striking nuclei.
only true for nuclear fusion when there are two tiny nuclei merging together.large-scale energy release – relevant to both fission and fusion exclusively true for nuclear fission:
a single massive nucleus rupturing only true for nuclear fission when two tiny nuclei form.
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how much energy is evolved during the reaction of 48.7 g of al, according to the reaction below? assume that there is excess fe2o3.
(D) 769 KJ energy evolved during the reaction of 48.7 g of Al, according to the reaction given.
Mass of aluminium (Al) = 48.7 g
Molar mass of aluminum (Al) = 27 g/mol
Heat of reaction = -852 KJ
Energy evolved = ?
Write the balanced chemical equation
Fe₂O₃(s) + 2 Al(s) → Al₂O₃(s) + 2 Fe(s)
Calculate the number of moles of Al
number of moles = mass / molar mass
Put the values
number of moles of aluminum = 48.7 g / 27 g/mol
number of moles of aluminum = 1.8037 mol
It is clear that the number of moles of Fe₂CO₃ is half of Al, divide the number of moles of Al by 2
number of moles of Fe₂CO₃ = 1.8037 / 2
number of moles of Fe₂CO₃ = 0.90185
heat of reaction for 1 mole of Fe2CO3 = 852 KJ
heat of reaction for 0.90185 moles of Fe₂CO₃ = 0.90185 mol × 852 KJ
heat of reaction for 0.90185 moles of Fe₂CO₃ = 769 KJ
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What nitrogenous base would bond with cytosine in a complimentary strand of dna?.
Guanine bond with cytosine in a complimentary strand of DNA.
Nitrogenous bases, additionally called nucleobases, are nitrogenous compounds that shape an crucial part of the nucleotides. Nucleotides are constructing blocks of DNA and RNA that are composed of a sugar, nitrogenous base and a phosphate organization.
A fixed of five nitrogenous bases is used in the construction of nucleotides, which in flip increase the nucleic acids like DNA and RNA. These bases are crucially crucial because the sequencing of them in DNA and RNA is the manner records is stored.
Under ordinary conditions, the nitrogen-containing bases adenine (A) and thymine (T) pair together, and cytosine (C) and guanine (G) pair collectively. The binding of these base pairs paperwork the shape of DNA .
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Which is the smallest possible particle of an element? molecule atom compound matter
Answer: Atom
Have a good day!
A tree collects energy from the sun, carbon dioxide from the air, and nutrients and water from the soil. The tree also outputs oxygen and water. What type of system is this?.
Trees and plants use the energy from the sun and the carbon dioxide in the air to create the food they need to survive and develop through a process called photosynthesis.
How does photosynthesis work?In addition to plants that have chlorophyll, photosynthesis is a mechanism that uses sunlight to help plants produce food.
What happens during the photosynthesis process?A process known as photosynthesis occurs when the chlorophyll on a plant's leaves absorbs sunlight and uses it to change carbon dioxide and water into oxygen, hydrogen (water), and glucose. This glucose can then be used by the plant again or stored in the fruit.
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12. What is the internationally accepted system for measurement called? Imperial System of Measurement National System of Units O International System of Units (SI) U.S. Customary System of Measurement
Internationally accepted system for measurement called as international system of units (SI)
The international system of unit (SI) is commonly known as the metric system and is the international standard for measurement and the international treaty of the meter was signed in Paris on may 20 1875 by seventeen countries including the united states and is now celebrated around the globe as world metrology day and long the dominant measurement system used in science
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4. Which of the following are examples of precipitation reactions? Select all that apply.
O 2 H₂(g) + O2(g) → 2 H₂O(1)
O KCl(aq) + AgNO3(ag) → KNO3(aq) + AgCl(s)
O Mg(s) + O2(g) → MgO2(s)
O HCl(aq) + NaOH(ag) → H₂O(1) + NaCl(aq)
Option - b is answer.
KCl(aq) + AgNO₃(ag) → KNO₃(aq) + AgCl(s) is example for precipitation reactions.
What kind of precipitation reaction is this, specifically?The chemical reaction between potassium chloride and silver nitrate, which results in the precipitation of solid silver chloride, is one of the best illustrations of precipitation reactions. The precipitation reaction resulted in the formation of this insoluble salt.
In a precipitation reaction, dissolved substances combine to create one or more solid products. This type of reaction occurs frequently and is also known as double displacement, double replacement, or metathesis reactions because it frequently involves the exchange of ions between ionic compounds in aqueous solutions.
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a 1 liter solution contains 0.335 m hydrocyanic acid and 0.446 m sodium cyanide. addition of 0.368 moles of potassium hydroxide will:
addition of potassium hydroxide slightly increases the pH .
What is buffer solution ?
A buffer is a solution that can withstand changes in pH due to the addition of acidic or basic components. It can neutralize small amounts of added acids or bases and keep the pH of the solution relatively stable. This is important for processes and reactions that require a specific and stable pH range. Buffers have a working pH range and capacity that determines how much acid/base they can neutralize before their pH changes, and how much they change. Both of the two components (conjugate acid and conjugate base) are present in significant amounts and can neutralize small amounts of other acids and bases (in the form of H3O+ and OH-), thus withstanding pH changes. increase. Added to the solution. To illustrate this effect, we can consider a simple example of a buffer made from hydrofluoric acid (HF) and sodium fluoride (NaF). Hydrofluoric acid is a weak acid due to the strong attraction between the relatively small F ions and solvated protons (H3O+), which prevents complete dissociation in water.
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Help me please before 11:59 tmr
A fuel like natural gas is burned by a lot of hot water heaters. Because combustion is an exothermic reaction, the fuel's burning causes the water to heat up.
What is an exothermic reaction?Exothermic simply means "emitting heat." As an exothermic process develops, energy, frequently in the form of heat, is released.Energy is continuously released during an exothermic reaction, frequently in the form of heat.When new bonds form in the products of some chemical reactions, known as endothermic reactions, less energy is released than is required to break bonds in the reactants.Exothermic reactions characterize all combustion processes. A substance burns as it reacts with oxygen during combustion, releasing energy in the form of heat and light.Chemical processes known as exothermic reactions generate heat. when heat is transferred from the system to the environment. Therefore, the H of reaction is negative for exothermic processes.Exothermic reactions are those in which heat is released through chemical processes. Examples include a candle burning and a strong acid reacting with water.To learn more about exothermic reaction refer to:
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Help please?????!!!!!
Increasing order of electronegativity Scandiun < copper < Selenium
b. Polonium < oxygen < sulfur
c. Francium < cesium < rubidium.
Electronegativity, symbolized as χ, is the tendency for an atom of a given chemical detail to attract shared electrons while forming a chemical bond. An atom's electronegativity is tormented by each of its atomic wide varieties and the distance at which its valence electrons reside from the charged nucleus.
Electronegativity is a chemical belonging that describes the tendency of an atom or a practical organization to attract electrons toward itself. The electronegativity of an atom is tormented by both its atomic quantity and the distance that its valence electrons reside from the charged nuclei.
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how many different alkenes will be produced when the following substrate is treated with a strong base?
The substrate is a cyclohexane ring. There will be six different alkenes produced when the cyclohexane ring is treated with a strong base.
What is alkenes?
Alkenes are a common family of hydrocarbons discovered in crude oil. There is at least one carbon-carbon double bond in this family. This double bond significantly alters the chemistry of the family's compounds.
Alkenes, and ethene in particular, play a crucial role in the chemical industry. They are created through the cracking of the alkanes but are not present in significant amounts in crude oil. Like all hydrocarbons, alkenes burn in the presence of air to produce carbon dioxide and water. Ethene reacts violently in oxygen, making it ineffective as a fuel. Additionally, the alkenes are too useful for the production of plastics and numerous other chemicals that are used as fuels in the chemical industry.
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what is the difference between the energy level diagram for hydrogen and an energy level diagram for any atoms with two or more electrons
Hydrogen has only one electron, the only force that matters (in a classical approximation) is that which exists between the positively charged nucleus and the single negatively charged electron.
The negatively charged electrons in a multi-electron atom repel one another. This phenomenon, which we refer to as "electron screening," often increases the energy of all orbital energy levels and divides the energy of a shell's subshells.
What do you mean by energy level diagram?The many discrete energy levels (or, energy states) for an atom, ion, or molecule are depicted in an energy level diagram. Only electronic states, only vibrational states, or both electronic and vibrational states may be depicted in an energy level diagram.
A Jablonski diagram is one sort of energy level diagram that shows both the electronic states of an atom, ion, or molecule and the electronic transitions between these states that these entities might experience. The states are piled vertically, with the states with greater energies being stacked higher. Several stacks with the same spin multiplicity states may be included in the figure (e.g., singlet-singlet or triplet-triplet states).
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Where does the electron have the most energy?.
We know that higher the object more will the potential energy,
Same way we can say that The potential energy of an electron is high when the electrons are excited
and jumps from lower energy orbital to the higher energy orbitals and goes farther away from the nuclear attraction region.
The formula to find the energy of electron at nth shell is given in the figure.
We know that electron carries a negative charge.
If you put a charged particle in motion and change its direction, it will radiate energy.
But electrons behave like waves, and these waves helps us know the probability of finding electrons i.e. orbitals that we label as s, p, d, and f orbitals.
Being in the orbitals of a particular shell, electron's energy will be limiting due to counter nuclear forces.
Electron as to leave atom, or an say nuclear region to attain its highest energy.
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