How many protons, neutrons, and electrons are present in (i) a neutral atom with an atomic number of 17 and a mass number of 35, and (ii) its ion with a charge of +1?

**(i)** Protons = Atomic number = 17 Neutrons = Mass number - Atomic number = 35 - 17 = 18 Electrons = Protons (neutral atom) = 17 **(ii)** Protons = 17 (unchanged) Neutrons = 18 (unchanged) Electrons = Protons + charge = 17 + 1 = 18