Chlorine (Cl)

Atomic Number: 17

Relative Atomic Mass: 35.4532

Electronegativity: 3.16


Atomic Radius (Picometers): 100


Appearance: Yellow-Green

Occurrence: Natural


Melting Point (Kelvin): 171.6

Boiling Point (Kelvin): 239.11 


Stable Isotopes: 35, 37

Discoverer: Carl Wilhelm Scheele in 1774

Properties: Highly Reactive, Poisonous

First Use: Brine (6000 BC)

Modern Uses: Disinfection, Purification

Picture Courtesy of W.Oelen


©2011 Grant Dwyer