Answer:
22
Explanation:
There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, the correct option is option D.
What is periodic table?Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.
Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet. For groups 13 through 18, the number of valence electrons is equal to the group number minus 10.
Therefore, the correct option is option D.
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Students were creating flashcards to help them remember the advantages and disadvantages of petroleum. Which student's flashcard is correct? Question 6 options: a) Student A: Petroleum is a solid fossil fuel that can be used to make plastics. It is the most polluting fossil fuel. b) Student B: Petroleum is an energy-rich fossil fuel used to make gasoline. It can cause environment damage if it spills or is burned. c) Student C: Petroleum is a gas that burns cleanly and is used to generate electricity. It has to be drilled from under the ocean floor. d) Student D: Petroleum is a type of biomass that is cheap and available most everywhere. It can create greenhouse gases when burned.
Answer:
C
Explanation:
I think its correct because I think c is the right answer
18) Why are the large oak trees so important for storks? Where are
they found?
1
Answer: Storks are found in medium to tall trees that occur in stands located either in swamps or on islands ... also an important feeding habitat for the nesting birds. ... six percent in dead oaks
Explanation: There important because Storks only live in these types of trees
Vote me for brainliest!!!!
How do Scientific laws and societal laws differ?
Answer:
Explanation:
scientific laws are not your everyday laws but society laws really have to be followed its whats keeps balance in this world
A freighter ship carrying a cargo of uranium hexafluoride sank in the English Channel in late August 1984. The cargo of uranium hexafluoride weighed 7.51 x 104 kg and contained 1.47 x 106 L of UF6. What is the density, in g/mL, of uranium hexafluoride?
Answer:
Heyo (Ish Mash Potato) XD
Explanation:
a freighter carrying a cargo of uranium hexafluoride sank in the english channel in 1984. the cargo of uranium hexafluoride weighed 2.25x10 to the eight power. kg and was contained in 30 drums, each having a volume of 1.62x10 to the sixth power L. what is the density in g/ml, of uranium hexafloride.
Hope Mr. Mash Potato Helped!!!
Explanation:
A freighter ship carrying a cargo of uranium hexafluoride sank in the English Channel in late August 1984. The cargo of uranium hexafluoride weighed 7.51 x 104 kg and contained 1.47 x 106 L of UF6. What is the density, in g/mL, of uranium
If the chemical properties of a substance remain unchanged and the appearance or shape of an substance changes it is called a
a.Chemical change
b.Physical change
c.Chemical Property
d.Both a physical and chemical change
e.Neither a physical or chemical change
Answer:
B
Explanation:
physical change is the answer I hope
Answer:
A
Explanation:
it is A because i am really smart
Electrons involved in bonding between atoms are____.
Answer:
valence electrons
The overall process of photosynthesis has the balanced chemical equation 6CO2 + 6H2O --> C6H12O6 + 6O2. What does this tell you about the relative amounts of carbon dioxide and water consumed in this process?
Answer:
Equal parts are needed to make glucose and oxygen. The excess oxygen is released into the air
Explanation:
This equation explains why having plants in your house is good.
Choose all answers that apply
PLZ HELP ASAP i am doing a test and i need help. I WILL BE DOING BRAINLIEST TO THE FIRST PERSON WHO REPLYS
When dynamite explodes, it releases a large amount of light and heat. This is an example of _____.
slow combustion
rapid combustion
an exothermic reaction
an endothermic reaction
a chemical change
a physical change
Answer
Rapid Combustion
Explanation:
An explosion is a combustion and a quick reaction, That makes it rapid
Describe how iron and sulfur can be an element, mixture, and a compound.
iron is a metal and sulfur is a non-metal and both are in the periodic table which means they are elements. Together they can form a compound with an ionic bond. and can be mixed to form a mixture.
what are some physical propeties of copper?
Put appropriate exact correct answers due in 10 mins
*please note that if you put incorrect and inappropriate answers I won't mark as braninlist I will report answer*
Answer:
Explanation: Reddidh colour
bright metallic luster
malleable and ductile
good conductor of heat
Answer:
Copper has a melting point of 1083.4 +/- 0.2°C, boiling point of 2567°C, specific gravity of 8.96 (20°C), with a valence of 1 or 2.
Copper is reddish colored and takes a bright metallic luster.
It is malleable, ductile, and a good conductor of electricity and heat
What point were the authors of the Declaration trying to make in the Preamble?
HELP.
Answer:
To explain why they are revolting against the king
Explanation:
Identifying Physical and Chemical Properties
Ques: how to identify physical or chemical properties
Ans: you can identify them by their properties. make sure that it matches its property. but you must know the physical and chemical properties . i will give an example .so how to identify boiling of eggs and changing of water into ice. Physical properties
-it can be reversed back
-it is temporary change
-no new substance is formed
chemical properties
-it cannot be reversed back
-it is permanent change
-new substance is formed
now boiling of eggs matches all property of chemical change so it is chemical change. changing of water to ice matches all property of physical change so it is physical change.
hope it helps
3. Three-quarters of the elements are ________________.
Definition of malleable? And example
What is earth science? What are the four major areas of earth science
Earth science can be described as the study of the structure of the earth, its properties, process, and 4.5 billion of biotic evolution. The four major areas of earth science are geology, oceanography, meteorology, and astronomy.
Why the studies of earth science are important?Earth science also known as geoscience includes all fields of natural science related to the Earth. This branch of science deals with the physical, chemical, and biological complex constitutions and linkages of the biosphere, atmosphere, hydrosphere, and geosphere.
Earth sciences include the study of geology, lithosphere, as well as the atmosphere, hydrosphere, and biosphere. Earth scientists use geology, oceanography, meteorology, astronomy, chronology, geography, physics, chemistry, biology, and mathematics to build an understanding of how Earth works and evolves.
Meteorologists study the weather and watch for dangerous storms while Hydrologists analyze water and warn of floods. Geologists study rocks and locate useful minerals and stones.
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How do bananas ripe? don't google it PLz and if you do I know whats the google answer
Answer:
they ripe if they are alone and not eaten for a long time the thing that is making it keep going is called ethylene
What is the harm done to the environment called
can someone help me calculate the average speed??
Answer:
3 meters per second
Explanation:
Average speed = total distance / total time
We know that total distance = 45 meters and total time = 15 seconds, hence, average speed = 45 meters / 15 seconds = 3 meters per second.
Answer:
V=S/t
Explanation:
V=?
S= 45meters
t=15sec
V=S/t
V=45/15
V=3m/sec
How do each earth’s layer compare to each other?
How dose the Temperature of a bouncy ball affect its bounce height?
Answer:
The colder the bouncy ball is the harder the rubber gets so it will contract ans make the bouncy ball heavier, the hotter the bouncy ball is the lighter it gets because the ball expands making the bouncy ball bigger
Explanation:
Dr.Okoh has a steel beam with a volume of 35cm to the third power and a mass of 1040g. Find the density
Answer:
The answer is
29.7 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} [/tex]
From the question
mass of steel beam = 1040 g
volume = 35 cm³
The density of the steel beam is
[tex]density = \frac{1040}{35} \\ = 29.714285...[/tex]
We have the final answer as
29.7 g/cm³Hope this helps you
EMERGENCY PLEASE HELP DUE IN 5 MINS!!! would your mass and weight differ on the Moon? The gravitational force of the Moon is one-sixth the gravitational force on Earth.
Answer:
Our weight on the moon is less than it would be on Earth due to a difference of the strength of gravity on the moon. The moon's gravitation force is determined by the mass and the size of the moon. ... This means that if you went to the moon you would weigh less, even though your mass stays the same!
Explanation:
The mass and weight of a person would be less on the moon on the earth because the gravitational force on the moon is less than that on the earth.
What is gravitational force?Gravitational force is the one by which all things pull onto the ground. It pulls everything towards itself. Gravity is present everywhere, but not in the same amount.
Gravity defines the weight of an object. On Earth, the weight is an object would be higher, than the planet, like Mars and the moon. The earth revolves on its axis and around the sun due to gravitational force.
The moon has a smaller mass than the earth and its pulling gravitational strength is also less, which is 1/6th of the earth.
Thus, Due to the moon's lower gravitational pull than the earth's, a person would have a lower mass and weight on the moon.
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Similarities between homogeneous and heterogeneous
Answer:
heterogeneous mixtures are mixtures that you can see the different compounds in them, homogeneous mixtures are mixtures that have different compounds in them but are not visible. they both have different mixtures or compounds in them.
Explanation:
How many moles are in 19.4 grams of sodium( Na)?
Answer:
0.844 mol Na
Explanation:
19.4 g Na x (1 mol Na/22.99 g Na) = 0.844 g Na
does anybody knows the field in science for the levels of organization
Answer:
Taxonomy
Explanation:
Taxonomy is the science of naming, describing and classifying organisms
Which is an example of how society affects science?
1.Laws have been passed banning the production of a living copy of a person.
2.Prices of prescription drugs have increased dramatically over time.
3.A girl has decided to bake a cake for her sister's birthday.
4.Some people enjoy watching stars and planets in the night sky.
Answer: Laws have been passed banning the production of a living copy of a person.
i just took the test so i know the answer is correct.
Answer:
The answer is A.
Explanation:
I just did the edgunuity test.
Use the periodic table to match each of the following element symbols to its name, atomic mass, or atomic number Match B) 32.06 (atomic mass) c) 14 (atomic number)
I need help with the same thing
Not sure if you need the answer anymore but...
Sp is A (antominy)
S is B (32.06 u)
Si is C (14)
Hope I helped anyone who needed this answer!
How many liters are equivalent to 645 mililiters
Answer:
0.645 liters
Explanation:
THE QUESTION IS equivalent 0.645 Liters
What is an example of a testable hypothesis?
Fire blankets are used for
Answer:
to put out fires or keep ppl safe from fire
Explanation:
