Answer:
The coin is less dense than the water thefore it can float.
Explanation:
Answer: atmospheric is air by the earth and pressure is just someone or something doing it
Explanation:
The atomic number tells you the number of protons in an atom. This value never changes because the number of protons in the nucleus always remains constant. The mass number tells you the number of protons and neutrons (or nucleons) together: protons + neutrons = mass number. Since the number of neutrons in the nucleus varies, you can have different amounts of neutrons in the same type of atom. These varied types are called isotopes.
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