Go to Home Page
 Go to Education Section
 You are here
 Go to Directories Section
 Go to Community Section
 Go to Fun Section
 Go to Science Store
 Go to About PhysLink.com
Top Destinations Menu
 Ask the ExpertsAsk the
Experts
 Physics Job BoardPhysics
Job Board
 Physics and Astronomy Departments DirectoryUniversity
Departments
 FREE Einstein eCardsEinstein
eGreetings
 PhysLink.com Science eStoreScience
eStore

Local in California?
Visit one of our retail stores.
XUMP - Science Toys





 Win an Apple iPod Touch 32GB! Or one of Einstein Stuff Packs worth over $50! Enter our Einstein Look-a-Like Photo Contest! Click here for more details.

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


go to the top  
All rights reserved. © Copyright '1995-'2008 PhysLink.com
Win an Apple iPod Touch 32GB! Or one of Einstein Stuff Packs worth over $50! Enter our Einstein Look-a-Like Photo Contest! Click here for more details.