Attribute | Value |
---|---|
Symbol | H |
Standard state | Gas |
Atomic mass | 1.008 u |
Electron configuration | 1s¹ |
Oxidation states |
|
Electronegativity (pauling scale) | 2.2 |
Atomic radius (van der waals) | 120 pm |
Ionization energy | 13.598 eV |
Electron affinity | 0.754 eV |
Melting point | 13.81 K |
Boiling point | 20.28 K |
Density | 8.988E-5 g/cm³ |
Atomic number | 1 |
Group name | Nonmetal |
Discovered | 1766 year |