Question

The atomic number of fluorine.

Answer 1

Atomic Number:

1. Atomic number of an element is equal to the number of protons or number of electrons present in the atom of that element.
2. Atomic number if denoted by $\mathrm{Z}$.

Atomic number of fluorine:

1. The atomic number of fluorine is nine $\left(9\right)$.
2. Thus, a fluorine atom contains $9$ protons and $9$ electrons.