Protons were discovered by Ernest Rutherford - a home schooled New Zealander.

They have a mass of 1.6726 x 10^-27 kg each.

Neutrons 1.6749 x 10^-27 each.

So neutron is heavier but not by much.

Electrons are a mere 9.109 x 10^-31 kg

Electrons are to Protons what grams are to kg (~ three orders of magnitude)