answersLogoWhite

0

The "37" in the question refers to the mass number, the total number of protons plus neutrons. We are trying to figure out how many nuetrons there are, but one thing we absolutely do know is the number of protons. All atoms of the same element contain the same number of protons, which is also the same as the atomic number. So if you have a Periodic Table, you would see that chlorine's atomic number is 17. Then all we need to do is a little subtraction (37-17) to find the number of neutrons, 20.

User Avatar

Wiki User

15y ago

What else can I help you with?