Compare Elements
Select up to 4 elements to compare their properties side by side.
He
Helium
#2 · Noble Gas
| Mass | 4.0026 u |
| Density | 0.0001785 g/cm³ |
| Melting | 0.95 K |
| Boiling | 4.22 K |
| Ionization Energy | 2372.3 kJ/mol |
| Atomic Radius | 31.0 pm |
| Block | s-block |
| State (RT) | Gas |
| Config | 1s2 |