Halogens are found in Group 16, Periods 2-4 of the Periodic Table.

Chlorine, Sodium, Iodine and Fluorine are all halogen elements.

Halogens are non-metallic, non-ductile, non-malleable and can be distinguished by their colors.

Halogens consist of 7 electrons in the outer shell.

There are 2 electrons taken in bonding.

A "salt" is when a halogen gains a neutron from a metal.

In the gaseous state, halogens form reactive, diatomic, covalent molecules.

Chlorine is used to purify drinking water.

An example of "sublimation" is dry ice.