Chlorine

From GAWDAwiki

Chlorine is a greenish-yellow gas that is a member of the halogen (salt-forming) group of elements and is obtained from chlorides by the action of oxidizing agents and more often by electrolysis; and combines directly with nearly all elements.^[1]

References

1. http://periodic.lanl.gov/elements/17.html http://periodic.lanl.gov/elements/17.html