Hey there!
This is a bromine atom, which means it has 35 protons.
If the sum of protons and neutrons is 79, then 79 - 35 = 44 neutrons.
Since the atom has a charge of 1+, there is one more proton than electrons, so 35 - 1 = 34 electrons.
79Br+ has 34 electrons, 35 protons, and 44 neutrons.
Hope this helps!
