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In situ availability: low
Necessity: useful
Atomic number: 9
Atomic mass: 18.9984032
group: 17
period: 2
normal phase: Gas
series: Halogens
density: 1.7 g/L
melting point: 53.53K,
boiling point: 85.03K,
O ← F → Ne
Atomic radius (pm): 50
Bohr radius (pm): 42
Covalent radius (pm): 71
Van der Waals radius (pm): 147
ionic radius (pm): (-1) 133
1st ion potential (eV): 17.42
Electron Configuration
2s2 2p5
Electrons Per Shell
2, 7
Electronegativity: 3.98
Electron Affinity: 3.4
Oxidation states: -1
Magnetism: Nonmagnetic
Crystal structure: Cubic

Fluorine is a Halogen in group 17. It has a Cubic crystalline structure. This element has a stable isotope of 19.

Fluorine is more concentrated in the mineral KREEP than its average concentration in lunar regolith.

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