Question

what is the overall charge on the nucleus of a fluorine atom? -1 +9 -9 +19

Explanation:

The nucleus of an atom contains protons (positively charged) and neutrons (neutral). Fluorine has an atomic number of 9, meaning its nucleus has 9 protons. Each proton has a +1 charge, so the total charge from protons is \(9\times( + 1)=+9\). Neutrons don't contribute to charge, so the overall nuclear charge is +9.

Answer:

B. +9