Alkali Metals
Name: Lithium
Symbol: Li
Atomic Weight: 6.941
Atomic Number: 3
Element Classification: Alkali Metals
Discovered By: Johann Arfwedson
Discovery Date: 1817 (Sweden)
Name Origin:Greek: lithos (stone).
Name: Sodium
Symbol: Na
Atomic Weight: 22.989768
Atomic Number: 11
Element Classification: Alkali Metals
Discovered By: Sir Humphrey Davy
Discovery Date: 1807 (England)
Name Origin:Medieval Latin: sodanum, (headache remedy), symbol from Latin natrium, (sodium carbonate).
Name: Potassium
Symbol: K
Atomic Weight: 39.0983
Atomic Number: 19
Element Classification: Alkali Metals
Discovered By: Sir Humphrey Davy
Discovery Date: 1807 (England)
Name Origin:English: pot ash; symbol from Latin: kalium, (alkali).
Name: Rubidium
Symbol: Rb
Atomic Weight: 85.4678
Atomic Number: 37
Element Classification: Alkali Metals
Discovered By: R. Bunsen, G. Kirchoff
Discovery Date: 1861 (Germany)
Name Origin:Latin: rubidus (deep red), the color its salts impart to flames.
Name: Cesium
Symbol: Cs
Atomic Weight: 132.90543
Atomic Number: 55
Element Classification: Alkali Metals
Discovered By: Gustov Kirchoff, Robert Bunsen
Discovery Date: 1860 (Germany)
Name Origin:Latin: coesius (sky blue), for the blue lines of its spectrum.
Name: Francium
Symbol: Fr
Atomic Weight: 223.0197
Atomic Number: 87
Element Classification: Alkali Metals
Discovered By: Marguerite Derey
Discovery Date: 1939 (France)
Name Origin:Named for France, the nation of its discovery.
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