| About the sample | This is a commercial sample. It is packed in a glass ampoule under low pressure. Hydrogen can glow in an electric field of a Tesla coil. This sample is a part of the private collection of Metodija Najdoski. |
| Z | 1 |
| ρ / g/cm3 | 0.088 |
| tt, mp / °C | -259.14 |
| tv, bp / °C | -252.87 |
| Ar | 1.008 |
| Electronegativity, (X) | 2.20 |
| Crystal structure | Hexagonal (the solid state) |
| Extended information | https://www.webelements.com/hydrogen/ |