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He
Helium
#2 · Igesi
| I-Mass | 4.0026 u |
| Uxinano | 0.0001785 g/cm³ |
| Uthuthu | 0.95 K |
| Ukomisa | 4.22 K |
| Ionization energy | 2372.3 kJ/mol |
| Atomic radius: | 31.0 pm |
| I-Block | s- iblock |
| Ilizwe (RT) | I-Gas |
| Qwalasela | 1s2 |