The nucleus of a bromine atom consists of 80 particles, of which 45 are neutrons.

The nucleus of a bromine atom consists of 80 particles, of which 45 are neutrons. How many electrically charged particles are in a bromine atom?

Given:

N = 80 – the total number of particles in the nucleus of the bromine atom;

N1 = 45 – the number of neutrons in the nucleus of the bromine atom.

It is required to determine the number of electrically charged particles in the bromine N2 atom.

Since the nucleus of any substance consists of neutral neutrons and positively charged protons, and the number of neutrons is known from the condition of the problem, then:

N2 = N – N1 = 80 – 45 = 35.

Answer: in the nucleus of bromine there are 35 positively charged electrical particles – protons.