Question

If Z is an atom's atomic number and A is its atomic mass, the atom's neutrons are expressed as:
A + Z
Z - A
A - Z
Z = A

Answer 1

I think it is Z-A

Answer 2

its a - z as z = no. of protons
a = no.of protons + no. of neutrons

Answer 3

ohh, i was so confused because the a and z messed with me. thank you!