Comparison of Hydrogen and Fluorine

Attribute	Fluorine ×	Hydrogen ×
Atomic mass (u)	18.99840316	1.008
Standard state	Gas	Gas
Oxidation states	-1	-1 +1
Electron configuration	[He]2s²2p⁵	1s¹
Atomic radius (van der waals) (pm)	135	120
Electronegativity (pauling scale)	3.98	2.2
Electron affinity (eV)	3.339	0.754
Ionization energy (eV)	17.423	13.598
Boiling point (K)	85.03	20.28
Melting point (K)	53.53	13.81
Density (g/cm³)	0.001696	8.988E-5
Atomic number	9	1
Group name	Halogen	Nonmetal
Discovered (year)	1670	1766
Symbol	F	H