Comparison of Oxygen and Neon

Attribute	Oxygen ×	Neon ×
Atomic mass (u)	15.999	20.18
Standard state	Gas	Gas
Oxidation states	-2	0
Electron configuration	[He]2s²2p⁴	[He]2s²2p⁶
Atomic radius (van der waals) (pm)	152	154
Electronegativity (pauling scale)	3.44	-
Electron affinity (eV)	1.461	-
Ionization energy (eV)	13.618	21.565
Boiling point (K)	90.2	27.07
Melting point (K)	54.36	24.56
Density (g/cm³)	0.001429	0.0008999
Atomic number	8	10
Group name	Nonmetal	Noble gas
Symbol	O	Ne
Discovered (year)	1774	1898