How many protons do all chlorine atoms have?

Chlorine is a well-known element with the symbol Cl and atomic number 17. It is a member of the halogen family and may be found on the periodic table between fluorine and bromine. Most of its characteristics fall somewhere between those of fluorine (F) and bromine (Br). At room temperature, it is a gas that is yellow-green. Chlorine is a highly reactive element and a potent oxidising agent. On the Pauling scale, it is only surpassed by fluorine and oxygen in terms of electronegativity.

Chlorine has an atomic number of 17 and an atomic mass of 35.45, meaning that an atom of chlorine consists of 17 protons, 17 electrons, and 18 neutrons.

Just like other halogen atoms, Chlorine is highly reactive. This is because halogens have seven outer ring electrons (“valence electrons”) but need eight to form a stable configuration. Metals will ionically bond with chlorine and yield an electron to halogens, forming a stable “octet.”

Hence, the correct option is (A).