Question

What element has atomic number of 9?

Answer 1

Fluorine has atomic number of 9.

Explanation:

The atomic number (Z), is the number of protons or electrons in an atomic nucleus.

Z = no. of neutrons or no. of electrons
In case of Fluorine (F)
No. of neutrons = 10
No. of electrons = 9
No. of protons = 9