Question

What is the total number of protons and neutrons in the nuclide `""_35^80Br`?

Answer 1

Well, there are `"45 neutrons"`...........

Explanation:

The atomic number, `Z`, of bromine is `35`. And thus the subscript in `""_35^80Br` is quite superfluous.......because the symbol `Br` specifies `35` nuclear charges........

We write `""^80Br`. Because the superscripted mass number is equal to the SUM of nuclear protons and neutrons, the number of neutrons is equal to `80-Z=80-35=45` `"neutrons.........."`

If you are unclear as to how I did this problem, come again and someone will help you. This really is a simple principle, and if it seems difficult it is only because it is unfamiliar.