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

elements make up everything, and they combine to make compounds.

the answer is c