An atom of element A has 75 protons. What would the element's atomic number be?

number of protons = atomic number and defines the element, like period.

by the way "atomic mass" is the sum of the number of protons and neutrons.

so its 75? since you said the proton is the same as the atomic number.

Yes, 75

By the way that is Rhenium

thankyou !

The atomic number of an element refers to the number of protons in the nucleus of an atom. In this case, you are given that the atom of element A has 75 protons. Therefore, the atomic number of element A would also be 75.