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Fluorine (F)
Atomic number: 9 · Category: diatomic nonmetal · Group 17 · Period 2 · Phase: Gas
Fluorine is a chemical element with symbol F and atomic number 9. It is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. As the most electronegative element, it is extremely reactive:almost all other elements, including some noble gases, form compounds with fluorine.
Atomic mass: 18.9984031636
Density: 1.696
Melting point: 53.48 K
Boiling point: 85.03 K
Source: Wikipedia
Block: p
CPK color:#90e050
Electronic structure
Electron configuration: 1s2 2s2 2p5
Configuration (semantic): [He] 2s2 2p5
Shells: 2, 7
Electronegativity (Pauling): 3.98
Electron affinity: 328.1649
Ionization energies: 1681, 3374.2, 6050.4, 8407.7, 11022.7, 15164.1, 17868, 92038.1, 106434.3
Periodic position
Group: 17
Period: 2
xpos: 17
ypos: 2
Spectral/Bohr images
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3D Model