Explain why the masses of atoms of the same element may differ

Hello!

each element atom has a certain number of protons, which weigh 1 AMU, but the same element can have a different number of neutrons (weighing 1 AMU), which results in what is called an isotope

Normally, the atoms contain the same amount on neutrons. However, sometimes they gain more neutrons, which increases the atomic mass by 1 AMU for each additional proton.

I hope this helps, and have a nice day!

b) returns freshwater to the earth.

c) returns freshwater to the earth.c) occurs after condensation.

d) returns freshwater to the earth.c) occurs after condensation.d) roughly equal to the amount of evaporation.

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less than one you can't create energy