Symbol
F
Atomic Number
9
Atomic Mass
18.998
Protons
9
Neutrons
10
Electrons
9
Type
Halogen
Isotopes
Fluorine-19
Discovery Year
1886
Discovered By
Henri Moissan
Group
17
Period
2
Boiling Point
-306°F
Melting Point
-363°F
Electron Configuration
[He] 2s² 2p⁵
Density (g/cm³)
0.001696
Crystal Structure
Monoclinic
Magnetism
Diamagnetic
Abundance in Earth's Crust
0.054%
Phase at Room Temperature
Gas