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Chemical element: Hydrogen (H)
| Atomic Number: | 1 |
| Element Symbol: | H |
| Element Name: | Hydrogen |
| Atomic Weight: | 1.00794 |
| Group Number: | 1 |
| Group Name: | none |
| Period Number: | 1 |
| Block: | s-block |
| Ground State Configuration: | 1s |
| Ground State Level: | 2S1/2 |
| Standard State: | Gas |
| Common Valences: | 1 |
| Bond Length: | 74.130 |
| Atomic Radius Empirical: | 25 |
| Atomic Radius Calculated: | 53 |
| Covalent Radius Empirical: | 37 |
| Vander Waals Radius: | 120 |
| Electron Affinity: | 72.8 |
| First Ionization Energy: | 1312.0 |
| Pauling Electronegativity: | 2.20 |
| Sanderson Electronegativity: | 2.59 |
| Allred Rochow Electronegativity: | 2.20 |
| Mulliken Jaffe Electronegativity: | 2.25 |
| Allen Electronegativity: | 2.300 |
| Molar Volume: | 11.42 |
| Velocity Of Sound: | 1270 |
| Refractive Index: | 1.000132 (gas; liquid 1.12) |
| Melting Point: | -259.14 |
| Boiling Point: | -252.87 |
| Critical Temperature: | -240 |
| Thermal Conductivity: | 0.1805 |
| Enthalpy Of Fusion: | 0.558 (per mol H atoms) |
| Enthalpy Of Vaporization: | 0.452 (per mole H atoms) |
| Enthalpy Of Atmization: | 218 |
| Most Common Oxidation Numbers: | 1,-1 |
| Color: | Colourless |
| Classification: | Non-metallic |
| Discovered By: | Henry Cavendish |
| Discovered At: | London, England |
| Discovered When: | 1766 |
| Origin Of Name: | From the Greek words hydro and genes meaning water and generator |
Calculate the molecular weight of Hydrogen or molecular weight H.
Also see the full list of chemical elements and atomic weights.
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