Isolated by Sir Humphry Davy at the Royal Institution,
Soft, silvery white metal which oxidizes rapidly when cut.
Reacts vigorously with water. Produced in large quantities and used as
metal in heat exchanger in atomic reactors. NaCl is key industrial
chemical, used to make Cl2, NaOH, etc.
Compounds containing sodium give a strong and persistent yellow flame
test. The test is so sensitive that sodium contamination may give a false
Glass blowers Didymium Safety Glasses may be used to
block out this emission to observe the less intense colors from other
Emsley, J., 1991; THE ELEMENTS : Sec. Ed.,
Clarendon Press, Oxford, 251 p.