Question

1. give the atomic number of each isotope.

a. magnesium - 25
b. bromine - 79
c. antimony - 121

Explanation:

The atomic number of an element is a fundamental property that does not change for its isotopes. For magnesium (\(Mg\)), it is always \(12\) regardless of the isotope (e.g., magnesium - 25). Bromine (\(Br\)) has an atomic number of \(35\) for all its isotopes (e.g., bromine - 79). Antimony (\(Sb\)) has an atomic number of \(51\) for all its isotopes (e.g., antimony - 121).

Answer:

a. \(12\)
b. \(35\)
c. \(51\)