 |
| General |
| Name | Hydrogen |
| Symbol | H |
| Number | 1 |
| Group Number | 1 |
| Group | Non-Metal |
| Block | s |
| Density | 0.0000899 g/cm3 |
| Atomic Weight | 1.00794 g/mol |
| Atomic Volume | 14.4 cm3/mol |
| Discover | 1766 |
|
| States |
| State | Gas |
| Melting Point | 14.01 K |
| Boiling Point | 20.28 K |
| Triple Point | 13.8033 K |
| Critical Point | 32.97 K |
| Heat of Fusion | 0.05868 kJ/mol |
| Heat of Vaporization | 0.44936 kJ/mol |
|
| Energies |
| First Ionization Energy | 1312 kJ/mole |
| Second Ionization Energy | Nil |
| Third Ionization Energy | Nil |
| Electronegativity | 2.20 |
| Electron Affinity | 72.7711 kJ/mole |
| Specific Heat | 14.304 J/gK |
| Heat Atomization | 218 kJ/mole atoms |
|
| Oxidation and Electrons |
| Shells | 1 |
| Electron Configuration | 1s1 |
| Minimum Oxidation Number | -1 |
| Maximum Oxidation Number | 1 |
| Minimum Common Oxidation Number | -1 |
| Maximum Common Oxidation Number | 1 |
|
| Appearance and Characteristics |
| Crystal Structure | hexagonal |
| Characteristics | diatomic, dens |
| Color | colorless |
| Uses | rocket fuel |
| Hardness | mohs |
| Toxicity | None |
|
| Reactions |
| Reaction with Air | vigorous, => H2O |
| Reaction with 6M HCl | None |
| Reaction with 15M HNO3 | None |
| Reaction with 6M NaOH | None |
|
| Other Forms |
| Number of Isotopes | 3 |
| Hydride | H2 |
| Oxide | H2O |
| Chloride | HCL |
|
| Radius |
| Atomic Radius | 37.1 pm |
| Ionic Radius (1+ ion) | Nil |
| Ionic Radius (1- ion) | Nil |
| Ionic Radius (2+ ion) | Nil |
| Ionic Radius (2- ion) | Nil |
| Ionic Radius (3+ ion) | Nil |
|
| Conductivity |
| Thermal Conductivity | 0.18 J/m-sec-deg |
| Electrical Conductivity | 1/mohm-cm |
| Polarizability | 0.7 A3 |
|
| Abundance |
| Source | Water, methane |
| Relation Abundance Solar System | 10.446 log |
| Abundance Earth's Crust | 3.1 log |
|
