Question

How many protons do all chlorine atoms have?

Answer 1

Every chlorine atom has 17 protons, 17 fundametal positively charged nuclear particles.

Explanation:

Elemental identity is defined by the number of protons, fundamental, massive, positively charged nuclear particles. The number of protons give `Z`, the atomic number, the which determines elemental identity: `1` for `H`; `2` for `He`;.......and `17` for `Cl`.

Do you have to remember these numbers? NO, because for every test in Chemistry and Physics you will ever sit, you should be supplied with a Periodic Table of Elements as a matter of course. You still have to be able to use the Table, so get on the case.