Answer:
1.Molecules are made of atoms. So different molecules can have different (or same) number of atoms they are made of.Different atoms are made of different number of protons of neutrons in the nucleus (also electrons around the nucleus but they are very small even compared to atom and don’t add up for volume or mass) therefore their radius and mass are different.
2.Chromatography works because of differences in the properties of molecules in materials.some molecules differ in shape and size. These differences in molecular properties allow scientists to separate compounds into individual molecules using chromatography.
Explanation:
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isotopes have the same atomic number because they are the same element but have a different atomic mass because they contain a different number of neutrons.
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I believe it is A because a physical change is something that can be changed back to where a chemical change can not be such as burning something.
The correct answer is D, the Endothermic Process.
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Answer:
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Explanation:
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