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 and does not change for its isotopes. We can refer to the periodic table to find the atomic number of each element.

• For magnesium (\(Mg\)), from the periodic table, its atomic number is \(12\).
• For bromine (\(Br\)), from the periodic table, its atomic number is \(35\).
• For antimony (\(Sb\)), from the periodic table, its atomic number is \(51\).

Answer:

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