9
F
18.998
Fluorine (F)
Element 9 · Period 2 · Group 17
halogen
gas at room temp
p-block
About Fluorine
Most electronegative element. Extremely reactive. Used in Teflon and dental fluoride.
Physical Properties
Atomic Mass
18.998 u
State at 25°C
Gas
Melting Point
-219.67 °C
Boiling Point
-188.11 °C
Density
0.001696 g/cm³
Magnetism
Diamagnetic
Atomic Properties
Electron Configuration
[He] 2s² 2p⁵
Electron Shells
2, 7
Electronegativity
3.98
Atomic Radius
42 pm
Ionization Energy
1681 kJ/mol
Oxidation States
-1
Discovery & History
Discovered By
Henri Moissan
Discovery Year
1886
Named By
André-Marie Ampère
Name origin: Latin: fluere (to flow)
Frequently Asked Questions
- Is Fluorine a metal, nonmetal, or metalloid?
- Fluorine is classified as a halogen.
- What state is Fluorine in at room temperature?
- Fluorine is a gas at standard room temperature (25°C).
- What is the atomic mass of Fluorine?
- Fluorine has an atomic mass of 18.998 atomic mass units (u).
- Who discovered Fluorine?
- Fluorine was discovered by Henri Moissan in 1886.
- Where is Fluorine on the periodic table?
- Fluorine is element number 9, located in period 2 and group 17.