O

OXYGEN

Definition From "oxys" and "gen" or acid-forming. most common elemtn on earth which makes up 21% by volume of the atmosphere. A constituent of all living things to maintain life.

Discovery 1774 by Josepg Prestly of britain and Carl Wilhelm Scheele of sweden

Uses Air supply, Steelmaking agent

Group of Elements Non-metals(Gas)

Atomic Weight 15.99903; 15.99977

Oxidation State -2

Melting Point -218.4

Boiling Point -182.9

Density 1.149 g/cm3

Electronegativity 3.5