What is Cl2 in the periodic table?

'Cl2' does NOT appear in the Periodic Table.

'Cl' is the element symbol for chlorine, which DOES appear in the Periodic Table.

'Cl2' is one molecule of the gas chlorine. ' Cl2' means two atoms of chlorine covalently bonded together.

Cl2 can be structurally written as ' Cl-Cl ' . It is a diatomic molecule. Diatomic ; contains two atoms.

All gases except the Noble(Inert) gases are either diatomic of polyatomic.

The Noble(Inert) gases are monatomic ; exist is single atoms.