Oxygen msds| properties| cas no| molecular formula | WorldOfChemicals

Oxygen Properties

Oxygen

Description

 

Oxygen is a member of the chalcogen group on the periodic table, and is a highly reactive nonmetallic period 2 element that readily forms compounds with almost all other elements. It was independently discovered by Carl Wilhelm Scheele, in Uppsala, in 1773 or earlier, and Joseph Priestley in Wiltshire, in 1774, but Priestley is often given priority because his work was published first. The name oxygen was coined in 1777 by Antoine Lavoisier, whose experiments with oxygen helped to discredit the popular phlogiston theory of combustion and corrosion. Uptake of oxygen from the air is the essential purpose of respiration, so oxygen supplementation is used in medicine. Treatment not only increases oxygen levels in the patient's blood, but has the secondary effect of decreasing resistance to blood flow in many types of diseased lungs, easing work load on the heart. Oxygen therapy is used to treat emphysema, pneumonia, some heart disorders, some disorders that cause increased pulmonary artery pressure, and any disease that impairs the body's ability to take up and use gaseous oxygen. Other uses of oxygen include the production of steel, plastics and textiles, rocket propellant, and life support in aircraft, submarines, spaceflight and diving.

Chemical Properties

Appearance Colourless Gas
Atomic Number 8
Atomic Weight 15.9994 g/mol
Block p
Boiling Point -182.95 °C
CAS Number 7782-44-7
Class 2.2
Crystal Structure Cubic
Density 1.429 g/l
EINECS Number 231-956-9
Electron Configuration 1s2 2s2 2p4
Group 16
Ionization Energy 1313.9 kJ/mol
Melting Point -218.79 °C
Oxidation State 2,1,−1,−2
PG NA
Period 2
RTECS Number RS2060000
Symbol O