Answer:
a.Carbon :proton number =6
electron number =6
b. Fluorine: proton number=9
electron number =9
c. tin: proton number=50
electron number =50
d. nickel:proton number=28
electron number =28
Explanation:
In the neutral state of an atom the number of protons is always equal to the number of electrons and that whats makes it electrically neutral as the positive charges of protons balances the negative charges of electrons.