Question

How many protons and electrons are present in one Br -ion2

Answer 1

Br- has 35 protons and 36 electrons

Step-by-step explanation:

Do you mean Br-?

Br has atomic number of 35 => 35 protons.

Neutral Br has 35 electrons.

Br- has 1 extra electron, resulting in total of 36 electrons.