Helium ("Óa-im: "he-lí-ùm""), ia̍h hāi sī 1 chióng bô sek, phīⁿ--khí-lâi, tam--khí-lâi lóng bô bī ê hoà-ha̍k goân-sò͘, sī chiu-kî-pió lāi-té bô siáⁿ oa̍h-tāng-la̍t ê 1 chióng hoâ-cho̍k khì-thé (noble gas), goân-chú-hoan 2. He ê kún-tiám ham iûⁿ-tiám sī choân-pō͘ goân-sò͘ lāi-té siāng kē--ê; nā m̄ sī kaù-te̍k ê chêng-hêng, He tiāⁿ-tio̍h sī khì-thé. Oá choa̍t-tùi lêng-tō͘ (absolute zero) ê sî, He ē pìⁿ-chiâⁿ 1 chióng chhiau-lâu-thé (superfluid), bô siáⁿ mô͘-chhat, sèng-chit chin te̍k-sû.
Quick facts Ki-pún sèng-chit, Miâ, hû-hō ...
Helium, 2He |
 Spectral lines of helium |
|
| Miâ, hû-hō | helium, He |
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| Gōa-hêng | colorless gas, exhibiting a red-orange glow when placed in a high-voltage electric field |
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|
|
|
| Goân-chú-hoan | 2 |
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| Goân-chú-liōng (±) | 4.002602(2)[1] |
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| Goân-sò͘ lūi-pia̍t | hi-iú khì-thé |
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| Cho̍k, hun-khu | 18 cho̍k, s khu |
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| Chiu-kî | tē 1 chiu-kî |
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| Tiān-chú pâi-lia̍t | 1s2 |
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| per shell | 2 |
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|
| Siòng | khì-thé |
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| Iûⁿ-tiám | 0.95 K (−272.20 °C, −457.96 °F) (at 2.5 MPa) |
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| Hut-tiám | 4.222 K (−268.928 °C, −452.070 °F) |
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| Bi̍t-tō͘ at stp (0 °C and 101.325 kPa) | 0.1786 g·L−1 |
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| 0.145 g·cm−3 |
| 0.125 g·cm−3 |
| Sam-siòng-tiám | 2.177 K, 5.043 kPa |
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| Lîm-kài-tiám | 5.1953 K, 0.22746 MPa |
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| Iûⁿ-hoà-jia̍t | 0.0138 kJ·mol−1 |
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| Cheng-hoat-jia̍t | 0.0829 kJ·mol−1 |
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| Jia̍t-iông-liōng | 20.78[2] J·mol−1·K−1 |
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cheng-khì-ap (defined by ITS-90)
| P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| tī T (K) |
|
|
1.23 |
1.67 |
2.48 |
4.21 |
|
|
| Sng-hòa-sò͘ | 0 |
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| Tiān-hū-tō͘ | Pauling scale: no data |
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| Tiān-lī-lêng | 1st: 2372.3 kJ·mol−1
2nd: 5250.5 kJ·mol−1 |
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| Kiōng-kè pòaⁿ-kèng | 28 pm |
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| Van der Waals pòaⁿ-kèng | 140 pm |
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|
| Chiⁿ-thé kò͘-chō | hexagonal close-packed (hcp) |
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| Siaⁿ-sok | 972 m·s−1 |
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| Jia̍t-thoân-tō-lu̍t | 0.1513 W·m−1·K−1 |
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| Chû-sèng | diamagnetic[3] |
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| CAS teng-kì pian-hō | 7440-59-7 |
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| Hō-miâ | after Helios, Greek god of the Sun |
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| Hoat-hiān | Pierre Janssen, Norman Lockyer (1868) |
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| Siōng chá hû-lî | William Ramsay, Per Teodor Cleve, Abraham Langlet (1895) |
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|
| Chú bûn-chiong: helium ê tông-ūi-sò͘ |
| iso |
NA |
half-life |
DM |
DE (MeV) |
DP |
| 3He |
0.000137%* |
3He is stable with 1 neutron |
| 4He |
99.999863%* |
4He is stable with 2 neutrons |
|
| * Atmospheric value, abundance may differ elsewhere |
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