Fluorine (F)

The lightest halogen and extremely reactive pale yellow gas.

It is so reactive it will burn through glass and steel.

Element properties

Atomic number
9
Symbol
F
Atomic mass
18.998 u
Category
Halogen
Period
2
Group
17
Block
p
State
Gas
Electron configuration
[He] 2s2 2p5
Electronegativity (Pauling)
3.98
Density
0.001696 g/cm³
Melting point
-219.6 °C
Boiling point
-188.1 °C

Uses