Explanation:the answer is in this link
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The low-mass elements, hydrogen and helium, were produced in the hot, dense conditions of the birth of the universe itself. The birth, life, and death of a star is described in terms of nuclear reactions. The chemical elements that make up the matter we observe throughout the universe were created in these reactions.
The answer is B.) stable ... all any atom wants to do is bond with a nother to share or take electrons to have a full valence shell
It’s called an isotope which is an atom with the same number of protons but a different number of neutrons
