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F - Fluorine

Fluorine

 Fluorine 
F
Atomic Number: 9
Atomic Weight: 18.998403
Element Type: Halogen
Crystal Structure: Cubic Face Centered
Melting Point: -219.62°C = -363.316°F = 53.53 K
Boiling Point: -188.12°C = -306.616°F = 85.03 K
Critical Temp: -129.02°C = -200.236°F = 144.13 K
Atomic Radius: 0.57 Å (Å = Angstrom = 10-10 m)
Covalent Radius: 0.72 Å
Electronegativity: 3.98

History

(L. and F. fluere, flow or flux) In 1529, Georigius Agricola described the use offluorspar as a flux, and as early as 1670 Schwandhard found that glass was etched whenexposed to fluorspar treated with acid. Scheele and many later investigators, includingDavy, Gay-Lussac, Lavoisier, and Thenard, experimented with hydrofluoric acid, someexperiments ending in tragedy.

The element was finally isolated in 1866 by Moissan after nearly 74 years of continuouseffort.


Sources




Science Quote

'Imagination disposes of everything; it creates beauty, justice, and happiness, which is everything in this world.'

Blaise Pascal
(1623-1662)


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