Comparison of Helium and Fluorine

Attribute	Fluorine ×	Helium ×
Electron affinity (eV)	3.339	-
Electronegativity (pauling scale)	3.98	-
Atomic mass (u)	18.99840316	4.0026
Standard state	Gas	Gas
Oxidation states	-1	0
Electron configuration	[He]2s²2p⁵	1s²
Ionization energy (eV)	17.423	24.587
Atomic radius (van der waals) (pm)	135	140
Boiling point (K)	85.03	4.22
Melting point (K)	53.53	0.95
Density (g/cm³)	0.001696	0.0001785
Atomic number	9	2
Group name	Halogen	Noble gas
Discovered (year)	1670	1868
Symbol	F	He