Which type of radioactive product has zero mass and zero charge?

Gamma radioactive product has zero mass and zero charge.If it is emmitted from a particle, there is no change in mass number or atomic number. gamma radiation occurs as a seperate step from alpha or beta decay. It can carry energy greather than alpha or beta rays

You use the atomic number to find out how many protons and neutrons there are in the atom. you use the atomic mass to find out how many protons and electrons there are in the atom.