Why chlorine is classed as a non-metal?

Answer 1

The electronic configuration of chlorine, Cl is [Ne] 3s2 3p5. The Cl atom needs to gain an electron to attain the stable octet structure or noble gas configuration. Thus it has a tendency to draw electrons toward itself (it has high electronegativity). Non-metallic elements are short of electrons and gain or share them from other elements through the different types of bonding.

Answer 2

Chlorine is classified as a non-metal because it lacks the characteristics of a metal. Non-metals typically have properties such as dull appearance, poor conductivity, and a tendency to gain electrons in chemical reactions, which chlorine exhibits. Additionally, chlorine is a halogen, which is a group of highly reactive non-metals on the Periodic Table.