The main component in a cement slab in a house is typically Portland cement.
Key points:
Portland cement is a type of hydraulic cement that is commonly used in the construction of buildings, bridges, roads, and other structures.It is made by heating a mixture of limestone and clay to high temperatures, a process known as calcination.The resulting material is ground into a fine powder, which can be mixed with water, sand, and gravel to form concrete.The concrete is then poured and leveled to form the slab.The cement reacts with water to form a paste that binds the other materials together, creating a strong and durable building material.Portland cement is also used in other types of construction, such as in the production of mortar and stucco.Other types of cement such as blended cement can be used too, depending on the requirement and the availability of the raw materials.Learn more about cement slabs here:
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Pleaseee help now ASAP please
Diphosphorus trichloride has a phosphorus content of 22.554%. Phosphorus is indeed a mineral that can be found in many foods naturally as well as in supplements. It has a number of functions in the body. It is a crucial component of cell membranes, bones, and teeth.
What occurs if you have a high phosphorus level?Frequently, high phosphorus does not result in any symptoms. On the other hand, an excess of phosphorous in your blood can result in calcium loss from your bones and other body tissues, resulting in low calcium levels (also called hypocalcemia). Low calcium levels do result in symptoms like: tense muscles
Does phosphorous hurt people?Severe vomiting & diarrhea, both of which are characterized as "burning," "luminescent," and with a garlic-like odor, are frequently brought on by ingestion of basic white or yellow phosphorus. Dysrhythmias, comas, hypotension, and even death are potential additional symptoms of severe poisoning.
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word equation for magnesium + sulphur (vi) acid
Mg + H2SO4 →→→ MgSO4 + H2
Magnesium reacts with sulphuric acid to yield magnesium salt and hydrogen gas
Is bf3 polar or non polar?.
The B-F bond is polar. In order to understand why BF3 is polar, it is important to first understand its molecular geometry. BF3 has a trigonal planar shape, which means that it has three atoms bonded to a central atom in a flat, triangular arrangement.
In this case, the central atom is boron (B) and the three bonded atoms are fluorine (F).
The B-F bond is polar because Boron has a lower electronegativity than Fluorine. This means that the electrons in the bond will be more attracted to the Fluorine atom, giving it a partial negative charge and the Boron atom a partial positive charge.
This creates a dipole moment in each B-F bond.
Since the three B-F bond dipoles are arranged in a plane with an angle of 120 degrees between them, the dipoles cancel each other out, resulting in a net zero dipole moment and making BF3 a polar molecule.
However, it is important to note that the polarity of a molecule doesn't always depend on the dipole moment, but also on the symmetry of the molecule.
BF3, although has a net zero dipole moment, symmetry is not perfect. The three bond dipoles are arranged in a plane, but they are not equal in magnitude and direction. This creates an overall molecular dipole moment, making BF3 polar.
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How many molecules of carbon dioxide (CO2) will be produced when 36.60 g of benzene (C6H6) reacts completely with excess oxygen (O2)?
1.69× 10²⁴molecules of carbon dioxide will be produced when 36.60 g of benzene reacts completely with excess oxygen .
What is moles?Mole, often known as mol, is a commonly used unit of measurement in chemistry for vast amounts of tiny objects including molecules, atoms, or other specific particles. In addition, the General Conference for Weights and Measures defines a mole as a unit of both the International Units System.
2C[tex]_6[/tex]H[tex]_6[/tex] + 15O[tex]_2[/tex] [tex]\rightarrow[/tex] 12CO[tex]_2[/tex] + 6H[tex]_2[/tex]O
moles of benzene = 36.60 g/78.11
=0.468 moles
the mole ratio between benzene and carbon dioxide is 2: 12
moles of carbon dioxide =6×0.468 moles
=2.80 moles
number of molecules of carbon dioxide =2.80 moles ×6.022×10²³molecules
=1.69× 10²⁴molecules
Therefore, 1.69× 10²⁴molecules of carbon dioxide will be produced when 36.60 g of benzene reacts completely with excess oxygen .
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How do I balance this?
Answer: 4NH3 + 5O2 —-> 4NO + 6H2O
Explanation: You balance it by making sure each have the same amount on each side.
There is 4 nitrogen on each side.
There is 12 hydrogen on each side (4*3) and (6*2).
There is 10 oxygen on each side (5*2) and (4+6)
Place each noble gas symbol in front of the appropriate partial electron configuration to create an accurate electron configuration.
An electron configuration that is complete up to a certain partial electron configuration must exist in the noble gas that comes before it.
When fully written out exactly before the partial electron configuration, the electron configuration of the noble gas should provide us with a reliable electron configuration for some element.
Our noble gas should at least be in the third period as the highest principal energy level in the first series bears the number 4. (numerically, the energy level is the same as the period number). Argon would be that noble gas. Note: All noble gases have an electron configuration that contains Np6, where N is the greatest main energy level. The partial electron configuration provided is not that of a noble gas.
Therefore, [Ar] serves as the noble gas that suitably comes before our first partial electron configuration.
The electron configuration of argon is1s²2s²2p⁶3s²3p⁶.. By applying the Aufbau Principle, 4s2 would naturally come after 3p6. Writing out t 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p²; is identical to writing [Ar]4s23d104p2, which also happens to be the electron configuration of germanium.
Hopefully, now that we have the basics established, we can use them to determine the noble gases that come before the remaining partial electron configurations.
Iodine's electron configuration is [Kr]5s²4d¹⁰5p⁵
The electron configuration of fluorine is [He]2s²2p⁵
Lead's electron configuration is [Xe]6s²4f¹⁴5d¹⁰6p²
Magnesium's electron configuration is [Ne]3s²
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Complete Question -
Place each noble gas symbol in front of the appropriate partial electron configuration to create an accurate electron configuration.
Helppppppppppppppppppppppppppppp
Answer:
বোকাচোদা মাণ্ডু খানকির ছেলে চোদাচুদি করে
How many moles are in 95 grams of MgCO3
1.1 moles
Explanation:Stoichiometry allows us to convert units such as grams to moles.
Molar Mass
Before we can convert grams to moles, we need to understand molar mass. Molar mass is the number of grams per mole. For example, the molar mass of oxygen is 16 g/mol. This means that there are 16 grams in one mole. Inversely, there is one mole in 16 grams of oxygen. Molar mass is a constant for each element that can be found on a periodic table.
Now, for this conversion, we need to find the molar mass of MgCO₃. To do this, we need to find the molar mass of each element within the compound.
Mg = 24.3C = 12O = 16Now, multiply each molar mass by its subscript; then add the molar masses together.
24.3 + 12 + 3(16) = 84.3 gramsThe molar mass of MgCO₃ is 84.3 grams.
Converting to Moles
Now we need to use stoichiometry to convert grams to moles. So, we are going to divide the grams by the molar mass.
[tex]95g*\frac{1mol}{84.3g} =1.127 mol[/tex]So, there are approximately 1.127 moles in 95 grams. However, due to significant figures, we round this to 1.1 moles.
Stuck on bottom question, got to look at 5 images above and try describing what each sentence mean to that structure.
The correct answer is simple molecular structure.
What is a molecule?
It can be homonuclear, that is, it consists of atoms of one chemical element, eg two atoms in an oxygen (O2) molecule; or it can be heteronuclear, a chemical compound composed of more than one element, eg water (two hydrogen atoms and one oxygen atom; H2O). In the theory of gases, the term molecule is often used for any gaseous particle, regardless of its composition.This relaxes the requirement that the molecule contain two or more atoms, since noble gases are single atoms.Atoms and complexes connected by non-covalent interactions such as hydrogen or ionic bonds are not usually considered to be single molecules.To know more about molecule, click the link given below:
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how much heat must be removed to freeze a tray of ice cubes if the water has a mass of 40.0 q? heat offusion=334 j/g; q = mHf
The heat that is removed is obtained as 13.36 kJ.
What is the heat that is to be removed?We have to note that the heat that is to be removed can be obtained from the heat of fusion of the substance. We have to note that the heat of fusion has to do with the heat that is absorbed or evolved when the substance is changed from solid to liquid.
We know that;
q = mL
q = Heat that is absorbed or evolved
m = mass of the object in grams
L = Heat of fusion.
Then we have;
q = 40 g * 334 J/g
q = 13.36 kJ
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Select all intermolecular forces that contribute to creating a solution of CH2Cl2 In H20. a. London Dispersion b. lon-dipole c. Dipole-dipole d. H-bonding
Intermolecular forces that contribute to creating a solution of CH2Cl2 in H2O are London Dispersion forces, Dipole-dipole interactions, and Hydrogen bonding.
London Dispersion forces occur between all molecules and result from the fluctuating distribution of electrons in the molecules, leading to a temporary dipole moment.
Dipole-dipole forces are attractive interactions between the positively charged end of one molecule and the negatively charged end of another molecule.
Hydrogen bonding occurs between molecules with hydrogen atoms covalently bonded to highly electronegative elements such as nitrogen, oxygen, or fluorine. In the case of CH2Cl2 in H2O, hydrogen bonding could occur between the polar H2O molecules and the chlorine atoms of the CH2Cl2 molecule.
Therefore, Intermolecular forces that contribute to creating a solution of CH2Cl2 in H2O are London Dispersion forces, Dipole-dipole interactions, and Hydrogen bonding.
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Why do data centers use so much energy?.
Data centers consume a large amount of energy to power their servers, cooling systems, and other necessary equipment.
Data centers have become increasingly important to the modern world, supporting the growing demand for cloud computing and storage. But, with this rise in usage comes an increase in energy consumption.
This energy consumption has significant implications for the environment and the cost of running a data center. In an effort to manage these costs, data centers have implemented multiple strategies to reduce their energy usage.
These strategies include using more efficient servers, utilizing renewable energy sources, and improving the efficiency of their cooling systems.
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Which of the following chemical equation represents a decomposition reaction? answer choices. H2SO3 → H2O + SO2. 2K + 2H2O → 2KOH + H2
The first equation, H2SO3 → H2O + SO2 is an equation that represents a decomposition reaction whereas the second equation, 2K + 2H2O → 2KOH + H2 is a single displacement reaction.
A decomposition reaction is defined as a chemical reaction wherein one reactant among the reactants, breaks down into two or more products.
The general format/formula of a decomposition reaction is:
AB -> A + B
where, AB is the parent molecule i.e. the reactant and A & B are the product molecules of the equation.
A decomposition reaction can be both endothermic (heat absorbing) or exothermic (heat releasing) in nature. However, the latter is more common in nature than the former.
One of the major applications of decomposition reaction is in the extraction of metals from their respective ores. For example, zinc(Zn) can be obtained/extracted from calamine (ZnCO3) by subjecting it to a decomposition reaction. In a manner similar to this, sodium can be obtained from it's ore sodium chloride (NaCl).
Some common existing examples of a decomposition reaction are provided below:
The decomposition of carbonic acid (H2CO3) in soft drinks, which can be equated as H2CO3 → H2O + CO2The reaction in the electrolysis of water to yield hydrogen and oxygen.Learn more about decomposition reaction here:
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classify each statement based on whether it describes prokaryotes only, eukaryotes only, or can describe both prokaryotes and eukaryotes.Prokaryotes Eukaryotes Both Answer Bank unicellular contain mitochondria are generally less than 2 pm multicellularlack membrane-bound organelles
The following is the solution to the given question:
What are prokaryotes?
An organism lacks a distinct nucleus and other organelles due to the lack of an internal membrane. Bacteria are one of the best-known prokaryotes.
What are Eukaryotes?
Eukaryotes refer to unicellular or multicellular organisms whose cells contain distinct membrane-bound nuclei. Examples: plants and animals, fungi, and protists.
Prokaryotes: are generally less than 2um, lack membrane-bound organelles
Eukaryotes: multicellular, contain mitochondria
Both: Unicellular
Prokaryotes are single-celled organisms, but there are also single-celled eukaryotes such as yeast, and protists.
Eukaryotes have membrane-bound organelles like mitochondria, whereas prokaryotes lack membrane-bound organelles and prokaryotic cells are smaller than eukaryotic cells.
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Can anyone please help me. It’s a pretty big one. (100 points) I don’t know if it’s chemistry or physics. I do know that it’s part of science.
In the expiration of the extended deadline in 1982, most activists and lawmakers conceded defeat to the ERA. However, in the four decades since Congress first proposed the ERA, courts and legislatures have realized a large portion of what the amendment was intended to achieve.
What are the world's oldest known rocks ?The major events in geologic time ranged from 4,500 million to 540 million years and included the formation of Earth and the discovery of the oldest rocks.
The formation of the majority of primitive fossils.
The production of oxygen in the early atmosphere.
The beginning of complex life.
4.36 billion years are the oldest zircon dates. Prior to this study, the oldest dated rocks were from the Acosta Gneiss in the Northwest.
The oldest zircons in the study, which came from Western Australia's Jack Hills, were around 4.3 billion years old.
The Cambrian explosion kicked off the Paleozoic Era. It came to an end with the Permian extinction. Invertebrates diversified in the oceans during the era.
Extinction events in the past have been caused by extreme temperature changes, rising or falling sea levels, and catastrophic, one-time events such as a massive volcano erupting or an asteroid striking Earth.
Cycads, glossopterids, primitive conifers, and ferns had spread across the landscape by the end of the Paleozoic. The Permian extinction occurred 251.4 million years ago.
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In the diagrams above, explain what type of competition is in each and support your answer.
Answer:
1st one is competition (when two organisms fight for limited resources)
2nd one is predation (pursuit, catching food)
Explanation:
hope this helps
An atom of the ame element X ha an atomic number 8 and ma number 16,17,18. What i reponible for the difference in their ma number
The atomic weight of oxygen would be 16 if every known oxygen atom had 8 protons and 8 neutrons.
However, we are aware that some types of oxygen contain fewer than 8 neutrons in their nucleus, which accounts for the slightly below-16 atomic weight of some kinds of oxygen.
As a result, oxygen atoms have eight protons. Oxygen atoms typically have 8 neutrons as well. Oxygen atoms with 8 neutrons would have a mass of roughly 16 amu since their mass number is 16 (8 p+ + 8 n0).
Isotopes are atoms with the same number of protons but differing numbers of neutrons. Various atoms of an element may have different masses because the amount of neutrons for a particular element might change.
As an illustration, certain helium atoms have three neutrons as opposed to two.
Take the atomic number (Z) of 8 for oxygen. As a result, oxygen atoms have eight protons. Oxygen atoms typically have 8 neutrons as well. Oxygen atoms with 8 neutrons would have a mass of roughly 16 amu since their mass number is 16 (8 p+ + 8 n0).
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How do you find the moles of H2O?.
To determine mole of Water or H₂O, you can do as follow:
Determine the atom of Water. As we know that is two hydrogen atoms and one oxygen atom.Each mole of the water molecule has 0.2 g. this calculated by adding the masses of a number of atoms elaborate in the formation of the water molecule Mass of water = ( 2 × 1 . 008 ) + 16 = 2032Determine total mr of water from periodic table and we will found the value is 18 g/molDetermine the mole by the formula: n = mass :total Mr. then we will find out that n = ( 2032)x : 18 where x is total water molecule.What are molecules?Molecule is a chemistry essence that contain two or more atom combines. The characteristic of molecule could be acid, base or neutral. Water is a molecule that has pH in neutral or pH = 7.
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What is emitted from the nucleus during beta decay?
β particles emitted from the nucleus during the β-decay. These are the high speed electrons with high energy.
[tex]\beta[/tex] - decay is the process where atoms emit beta particles. It occurs when an atom has either too many protons or too many neutrons in its nucleus. There are two types of beta decay. One is positive beta decay. another is negative beta decay. Positive beta decay releases a positively charged beta particle called a positron and a neutrino. The negative beta decay releases a negatively charged beta particle called an electron and an antineutrino. Negative beta decay is more common than positive beta decay. Beta particles have all the characteristics like electrons.
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Solve C2H4 + O2 = CO2 + H2O using the algebraic method.
C2H4 + O2 → CO2 + H2O ⇒ C2H4 + 2.5O2 → 2CO2 + H2O
How does balancing of chemical rection?The algebraic method of balancing a chemical equation involves writing the reactants and products of the reaction as symbols and assigning each side of the equation a numerical coefficient to balance the equation. The coefficients must be rational numbers, and all coefficients must be multiplied by the same number to conserve the number of atoms of each element on both sides of the equation.For example, if a reaction is written as A + B → C, then the coefficients of A and B are multiplied by the same constant until the number of atoms of each element on both sides of the equation is equal. If the coefficients of A and B are 2 and 3 respectively, then they must both be multiplied by 3 to balance the equation, so the balanced equation would be 6A + 9B → C.
In this question
Step 1: Balance the equation.
C2H4 + O2 → CO2 + H2O
2C2H4 + 5O2 → 4CO2 + 2H2O
Step 2: Isolate the variable.
Divide both sides of the equation by 2.
C2H4 + 2.5O2 → 2CO2 + H2O
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Luis5385
04/28/2018
Chemistry
High School
answered • expert verified
The tendency for a replacement reaction to occur increases as the _____. interval between any two elements in the activity series decreases temperature decreases valence electrons are used up interval between any two elements in the activity series increases
Option (d) is correct. The tendency for a replacement reaction to occur increases as the interval between any two elements in the activity series increases.
A replacement reaction is said to be a reaction occurs when elements switch places in compounds. This reaction involves ions. In this type of reaction more reactive elements replace less reactive elements. A replacement reaction occurs when one element replaces another element in one compound. here, less reactive elements replaced by more reactive elements. so, larger the interval between the elements in the activity series the greater the tendency for the replacement reaction to occur.
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The complete question is,
The tendency for a replacement reaction to occur increases as the _____.
(a) interval between any two elements in the activity series decreases ( b) temperature decreases
(c) valence electrons are used up
(d) interval between any two elements in the activity series increases
If 165 J of energy raises the temperature of 20 g of an unknown metal from 30 to 50 degrees Celsius, what is the metal's specific heat?
0.103
0.413
66,000
4,950,000
AT=(Tr-T))
c = Specific Heat
AE= Heat Energy / Heat Gain or Loss
AE=mcAT
0.4125 joules per gram per degree Celsius is the metal's specific heat.
What does specific heat mean?
The amount of heat needed to increase the temperature of one gram of a substance by one degree Celsius is known as specific heat. Typically, the units of specific heat are calories or joules per gram per Celsius degree. As an illustration, the specific heat of water is 1 calorie (4.186 joules) per gram per degree Celsius.
The heat that a system releases or absorbs per unit mass during an irreversible isobaric-isothermal phase shift is known as latent heat.
c = Specific Heat
AE= Heat Energy / Heat Gain or Loss
AE=mcAT
165 = 20 *c * (50-30)
c = 165/ (20*20)
c = 0.4125
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Amazon ell a 12 pack of Sprite for $5. 79. Each can hold 12 fluid ounce. How much are you paying per gallon?
The price per gallon is $5.16.
How much are you paying per gallon?To determine the price per gallon, we first need to convert the number of fluid ounces in each can to gallons.Therefore, to convert fluid ounces to gallons, we divide the number of fluid ounces by 128.A 12 pack of Sprite cans holds 12 fluid ounces x 12 = 144 fluid ounces.In gallons it will be equal to 144 fluid ounces / 128 fluid ounces/gallon = 1.125 gallons.To determine the price per gallon, we divide the total price of the 12 pack by the number of gallons.$5.79 / 1.125 gallons = $5.16/gallon.So the price per gallon is $5.16.
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what is the difference between organic and inorganic chemistry ?
The primary difference between organic chemistry and inorganic chemistry is that organic compounds mandatorily have a carbon atom, while most of the inorganic compounds do not contain a carbon atom.
Inorganic chemistry is mostly concerned with the properties and behavior of the inorganic compounds, which include minerals, metals and organometallic compounds.
Inorganic chemists are employed in fields ranging from mining to microchip making. The works are based on understanding the following:
The behavior and analogues for the said inorganic elements, and How these materials can be separated, modified and used.On the other hand, Organic chemistry is the study of the properties, structure, composition, preparation and reactions of carbon-containing compounds. Most organic compounds contain carbon and hydrogen together, but they may also include any number of other elements too (e.g., nitrogen, oxygen, halogens, phosphorus, silicon, sulfur).
Organic chemists spend most of their time developing noval/new compounds and finding better sustainable ways of synthesizing existing ones.
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What statement best describes the transfer of energy in the photo?
B. when water changes state from a solid to a liquid, thermal energy is absorbed.
What is transfer of energy?The process of moving energy from one system to another, such as through the transmission of heat, work, or mass, is known as energy transfer.
It should be noted that the transformation of energy into another form or the transfer of energy from one location to another.
The mode of energy transfer are:
RadiationConduction, and Convection of Heat EnergyIn summary, thermal, radiant, chemical, nuclear, electrical, motional, acoustic, elastic, and gravitational energy are some of the different types of energy.
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the maximum buffering effect of a weak acid occurs at.....?
When the ratio of weak acid and its salt in a buffer is equal to 1, it is said that the buffering capacity is maximum.
A buffer is made up of either a weak acid and its salt or a weak base and its salt.
The amount of acid or base that can be added to a given volume of a buffer solution before the pH changes significantly, usually by one unit, is referred to as the buffering capacity. Buffer capacity is determined by the amounts of weak acid and conjugate base present in a buffer mixture.
When NaOH is added to solutions containing varying concentrations of an acetic acid/sodium acetate buffer, the observed change in buffer pH is inversely proportional to the buffer concentration. If the buffer capacity is increased by tenfold, the buffer solution can absorb ten times the amount of strong acid or base previously.
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What is kinetic energy class 11?.
Kinetic energy is the energy an object possesses due to its motion.
It is the energy an object has because of its movement, regardless of the direction it is moving in. The kinetic energy of an object increases as the square of its velocity, so as the velocity increases, the kinetic energy increases rapidly. It can be calculated by using the formula KE = 1/2 * m * v^2, where KE is the kinetic energy, m is the mass of the object and v is the velocity of the object. Kinetic energy is a scalar quantity, meaning it does not have a direction, and it is measured in joules (J). It is an important concept in physics and it can be found in many everyday applications, such as in sports, transportation, and machinery. Kinetic energy is also a form of mechanical energy and it is related to other forms of energy such as potential energy and thermal energy.
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express the answer in scientific notation
(7.296 x 10^2) Divided by (3.6 x 10^-9)
7.296 x 102 in scientific notation 23x1011 is obtained by dividing by 3.6 x 109.
What do the symbols used in science mean?Very big or very low numbers can be written using scientific notation. Once a number within 1 and 10 has been multiplied by such a power of 10, it is then expressed in scientific notation. For instance, the scientific notation for 650,000,000 is 6.5 108.
What does notation serve as?A system of symbols and signs is used in notation to represent words, numbers, sentences, etc. The efficient communication of words, figures, and other objects is greatly aided by notation, which is frequently created for a specific purpose. Music notation is a prime example of notation.
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I’m doing a science project about does brands affect the way kids see clothing i need help finding my independent and dependent variable
one or more atoms of an element having the same number of protons but a different number of neutrons are..
a. elements have isotopes.
b. various means of forming chemical bonds.
c. isomers have an integer atomic mass value.
d. more than one atomic number.
Atoms having the same number of protons but a different number of neutrons are the elements have isotopes.
Isotopes are the atoms which is having the same number of protons but the different numbers of neutrons. Isotopes having the different atomic masses. The relative abundance of an isotope is the percentage of an atoms with a specific atomic mass which is found in a naturally occurring sample of an element. The number of protons in a nucleus will determines the element's atomic number on the Periodic Table. For example, carbon having six protons and its atomic number will be 6.
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