Question

What information does the atomic mass of an element provide?Question 2 options:A.the sum of electrons and protons in an atom (e + p)B.the number of isotopesC.the number of protons and neutrons in an atom (p + n)D.the difference between the number of protons and electrons (p - e)

Answer 1

Different elements exist in nature in different Isotopes , this isotopes average is taken as atomic mass .

so, the correct option will be Option B .