How many atoms are in Cl?

Answer 1

This question doesn't make sense. You may mean what is the molecular weight of the chloride ion. In that case it's about 35.5 grams per mole. A mole is a number (called Avagadro's number) that is representative of the amount of Carbon atoms in 12 grams of carbon12. Since different elements weigh different amounts, it's a way to compare the number of molecules or atoms present in a mixture or compound. But for simplicity's sake, just think of it as a number you express with a word--like a dozen means twelve. However, a mole is a very large number. It's 6.022 × 1023 or 602,200,000,000,000,000,000,000. So to have one mole of Hot Dogs, you would have 6.022 × 1023 hot dogs. The molecular weight is expressed in grams per mole. So the chloride ion (Cl-) has a molecular weight of 35.5 which means that one mole of chloride ions weighs 35.5 grams. You can then use this molecular weight to figure out how many moles of an element are in a certain number of grams. If you have 71 grams of chloride, you know that you have 2 moles by multiplying the amount of grams (71g) × 1 mol/35.5g = 2 mols

Answer 2

That is the symbol for the element chlorine. As a gas, it forms a diatomic molecule, Cl2 which contains two chlorine atoms.

Answer 3

A single chlorine atom contains 17 protons, 17 electrons, and usually 18 neutrons, totaling 35 subatomic particles.