How many protons and neutrons are in the nucleus of a bromine atom?

Answer 1

There are 35 protons and 35 electrons in the elementary Bromine, Br

The number of neutrons however depends on the isotope mass number of Bromine:

There are two stable natural occurring isotopes Br-79(50.5%) and Br-81 (49.5%)

To know the number of neutrons one should substract the atom number (35) from the mass number and you'll find the number of neutrons being 44 and 46, because 35 protons with 44 (or 46) neutrons gives you the mass number 79 (or 81)

Answer 2

Bromine has the atomic number 35, which means there are 35 protons in the nucleus of an atom of bromine.

The mass number (also known as the atomic mass number) of an element is the sum of the protons and neutrons in the nucleus.

Bromine's mass number is 80, so there must be 35 protonsand 45 neutrons in an atom of bromine.

MASS NUMBER

As it happens, a molecule of bromine has two atoms (or four!), and spectrum analysis reveals that natural bromine is a 50:50 mixture of two bromine isotopes, 79Br and 81Br.

So, whether there are two or four atoms in a bromine molecule, the mass number of one bromine atom is taken as being 80.

(79+81=160, divided by 2 = 80. Or 79+81+79+81= 320, divided by 4 = 80)

Answer 3

Bromine's mass number is 80, and atomic number is 35, so there must be 35 protons and 45 neutrons in an atom of bromine.

Answer 4

The number of protons is the same as the atomic number, which is 35. Bromine can have 44 neutrons or 46 neutrons, depending on the isotope.

Answer 5

Bromine, Br, 35: There are 35 protons, 35 electrons and 45 neutrons in a neutral atom of Bromine.

Answer 6

Pure bromine is diatomic, Br2