Write the ion symbol for an atom with the given number of protons and electrons.

a. 35 protons and 36 electrons

Ion with 35 protons (p+⁺) and 36 electrons (e⁻) is bromine ion Br⁻

The atomic number of Br is 35 which means it has 35 protons and 35 electrons (it needs to be neutral). After receives 1e ⁻ it becomes negatively charged and has 36 e ⁻.