Tentukan proton,elektron, dan neutron dari 69 Ga 31 3+​

proton = no atom

elektron = no atom – ion

neutron = no massa – proton

1. 69 Ga 31 3+

no massa = 69

no atom = 31

ion = +3

proton = 31

elektron = 31 – 3 = 28

neutron = 69 – 31 = 38