Comparison of Fluorine and Neon

Attribute	Fluorine ×	Neon ×
Atomic mass (u)	18.99840316	20.18
Standard state	Gas	Gas
Oxidation states	-1	0
Electron configuration	[He]2s²2p⁵	[He]2s²2p⁶
Atomic radius (van der waals) (pm)	135	154
Electronegativity (pauling scale)	3.98	-
Electron affinity (eV)	3.339	-
Ionization energy (eV)	17.423	21.565
Boiling point (K)	85.03	27.07
Melting point (K)	53.53	24.56
Density (g/cm³)	0.001696	0.0008999
Atomic number	9	10
Group name	Halogen	Noble gas
Symbol	F	Ne
Discovered (year)	1670	1898