F

Fluorine

Identification

CAS Number: 7782-41-4

Discovery Year: 1886

Discoverer: Henri Moissan

Discovery Location: France

Properties

Atomic Mass: 18.998403163 →Density: 0.001553 g/cm³ →

Crust Abundance: 585 mg/kg

Crystal Structure: MCL

Atomic Dimensions

Atomic Radius: 50 pm →

Atomic Radius (Rahm): 163 pm

Covalent Radius: 56.99999999999999 pm →

Van der Waals Radius: 147 pm

Atomic Volume: 17.1 cm³/mol

Thermodynamics

Melting Point: 53.53 K →Boiling Point: 85.01 K →Thermal Conductivity: 0.028 W/(m·K) →Heat of Fusion: 0.51 kJ/mol →Heat of Vaporization: 6.54 kJ/mol →

Heat of Formation: 79.335 kJ/mol

Electronic Structure

Electron Config: [He] 2s2 2p5

Block: p

Period: 2 →Group: 17 →Electronegativity: 3.98 →Electron Affinity: 3.4011897000000006 eV →

Oxidation States: -1

Abundance & Geochemistry

Crust Abundance: 585 mg/kg

Sea Abundance: 1.3 mg/L

Geochemical Class: semi-volatile

Goldschmidt Class: litophile

About

Fluorine is the most reactive element. It is used in toothpaste, Teflon, and various industrial chemicals. In its elemental form, it is a pale yellow gas.

Isotopes

F-19 19 100.00%