He
Helium bụ ihe nke abụọ dị nro na nke abụọ dị ukwuu n'ụwa.
Nkarachọ
| Atomic mass | 4.0026 u |
| Mgbatị | 0.0001785 g/cm³ |
| Mmalite | 0.95 K |
| Nhazi | 4.22 K |
| Nhazi | Ụchaghị agba gas |
| Oge n'ime ụlọ | Gas |
Ihenhọrọ ndị ahụ
| Nhazi | 2372.3 kJ/mol |
| Elektrọn | -48.0 kJ/mol |
| Oxygenation state | 0 |
Ihenhọrọ nke atom
| Nhazi | 1s2 |
| Atomic Radius | 31.0 pm |
| Covalent Radius | 28.0 pm |
| Van der Waals Radius | 140.0 pm |
Ndesịta ozi ndị ahụ
| E chọpụtara site na | Pierre Janssen, Joseph Norman Lockyer |
| Ụbọchị emeredịkachọrọ | 1868 |
| Ebe | Guntur, India / London, England |
| Aha mgbe ahụ | Greek 'helios' pụtara ìhè |
Báà Helium
Helium bụ ọlaọcha, ọlaedo, inert monatomic gas nke na-ahazi usoro iheomume nke noble gas. O nwere ebe ọbụla nke ọlaọcha nke ihenhọrọ niile na 4. 22 K na ọ ga-akpụzi naanị n'okpuru mgbatị. Helium a kpụpụtara na Earthụ site na radioactive alpha decay nke ihenhọrọ dị njọ. A na-ahụ ya n'ụzọ spectrophotometric na Sun tupu a hụ ya na Earthụ.
Usoroiheomume
Cryogenics, MRI igwe, party balloons, deep-sea diving gas mixtures, leak detection, na semiconductor manufacturing.
Eziokwu dị ụtọ
Helium bụ ihe ikpeazụ a na-ahụ n'ime mbara igwe tupu a chọpụta ya na ụwa, a na-ahụ ya n'oge eklipse nke ọnwa n'afọ 1868.
Isotopes
| Nkebi | Afọ́ọ̀ltụ̀ | Half-Life | Òtù |
| 3 | 0.00000134% | - | Ee |
| 4 | 0.99999866% | - | Ee |
Nhazi
1s2