What is the isotope notation for chlorine?

is written as the following:

A Z X, where A is the total (protons + neutrons), Z is the , and X is the atomic symbol.

Clorine has two stable , Clorine-35 and Clorine-37. So for these isotopes, the mass numbers are 35 and 37. The atomic number for clorine is 17, and the symbol is Cl. Therefore, the isotope notation for chlorine would be written as:

35 17 Cl

and

37 17 Cl