5. express the composition of each atom in shorthand form.
a. zinc-64
b. chlorine-37
c. hydrogen-3
d. calcium-40

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

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