H
Hydrogen
H |
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|
Hydrogen |
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| next element |
| Atomic number | 1 |
| Atomic weight | 1.0079 |
| Orbital electronic configuration | 1s1 |
| First ionization energy (eV) | 13.598 |
| Electron affinity (eV) | 0.756 |
| Electronegativity (Pauling) | 2.2 |
| Atomic radius (Å) | 0.79 |
| Bonding radius (Å) | 0.32 |
| Oxidation states | +1, -1 |
Properties |
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| Density (g/liter @ 0oC and 1 atm.) (gas) | 0.0899 |
| Melting point (K) | 14.025 |
| Boiling point (K) | 20.268 |
| Heat of vaporization (kJ/mol) | 0.44936 |
| Heat of fusion (kJ/mol) | 0.05868 |
| Specific heat capacity (Jg-1K-1) | 14.304 |
| Crystal structure | hexagonal |