How many electrons are present in a bromine atom with a mass number of 87?

Question

Quizplus · Accepted Answer

The mass number of bromine is the sum of the protons and neutrons in its nucleus. Since the atomic number of bromine is 35 (meaning it has 35 protons), we can find the number of neutrons by subtracting 35 from 87: 87 - 35 = 52. The number of electrons in a neutral atom is equal to the number of protons, so a bromine atom with a mass number of 87 would have 35 electrons.

How Many Electrons Are Present in a Bromine Atom with a Mass