Subatomic Particles of Bromine:

* Protons: 35

* Neutrons: 45 (for the most common isotope, Bromine-80)

* Electrons: 35

Isotope Symbol for Bromine-80:

* ⁸⁰₃₅Br

This symbol indicates:

* 80: The mass number (protons + neutrons)

* 35: The atomic number (number of protons)

* Br: The chemical symbol for Bromine