
Chlorine, # 17 on the Periodic Table of Elements, is, by itself, a
yellow-green poisonous gas. It is an inorganic element that cannot exist
by itself in nature but needs to bond to another element, the most common
being sodium, hence, sodium-chloride, or salt.
In fact, commercial chlorine is produced by sending an electrical charge
through a salt water solution, disrupting the bond between chlorine
and sodium. The free chlorine is then captured and used for numerous
household and industrial applications