If an atom has 17 electrons and its mass number is 35, calculate the following: - number of protons - number of neutrons - atomic number

Electrons, Protons and the Atomic Number is the exact same. So

Protons - 17

Atomic Number - 17

and the neutrons come by subtracting the protons from the Atomic Mass, which in this case 35.

35-17 = 18

Neutrons = 18

Protons = 17

Atomic Number = 17

Neutrons = 18