Answer:
Explanation:
Zinc-64 = 30 proton, 30 electron and 34 neutron
chlorine-37 = 17 proton, 17 electron and 20 neutron
hydrogen-3 = 1 proton, 1 electron and 2 neutron
calcium-40 = 20 proton, 20 electron and 20 neutron
The numbers in front are the mass number, the number of proton equal number of electron in a neutral atom and these atoms do carry charge which means they are neutral. To calculate the number of neutron simply subtract the number of proton from the mass number
