how do i do this:

Question

give the number of protons, electrons, and neutrons in each of the following atoms.

108
47 Au

40
20 Ca

23
11 Na

Answer 1

The first one.
The atomic number is the number of protons. That is 47 in this example. The 108 is the mass number and gives the number of protons + the number of neutrons. Therefore, the number of neutrons is the mass number minus the number of protons. The number of electrons is the same as the number of protons.

Answer 2

ok so for the calcium one would it be
20 electrons
20 protons
and
20 neutrons?

Answer 3

yes, yes, and yes.