Question

7. Calculate the number of electrons, protons and neu

trons in Cl, Cl-

and Cl2

. Atomic number of chlorine =

17; Mass number = 35.​

Answer 1

Explanation:

The number of electrons in

37

Cl

−

ion with a charge of −1 is 18.

The atomic number of chlorine is 17. Thus neutral atom of chlorine contains 17 electrons. It gains one electron to form mono-negative ion with charge of -1.

Total number of electrons in this ion is 17+1=18