Helium

Helium,  ₂He

Spectral lines of helium
Ki-pún sèng-chit
Miâ, hû-hō	helium, He
Gōa-hêng	colorless gas, exhibiting a red-orange glow when placed in a high-voltage electric field
Helium tī chiu-kî-piáu lāi ê ūi-tì
– ↑ He ↓ Ne Chúi-sò͘ ← helium → Lithium
Goân-chú-hoan	2
Goân-chú-liōng (±)	4.002602(2)
Goân-sò͘ lūi-pia̍t	hi-iú khì-thé
Cho̍k, hun-khu	18 cho̍k, s khu
Chiu-kî	tē 1 chiu-kî
Tiān-chú pâi-lia̍t	1s2
per shell	2
Bu̍t-lí sèng-chit
Siòng	khì-thé
Iûⁿ-tiám	0.95 K ​(−272.20 °C, ​−457.96 °F) (at 2.5 MPa)
Hut-tiám	4.222 K ​(−268.928 °C, ​−452.070 °F)
Bi̍t-tō͘ at stp (0 °C and 101.325 kPa)	0.1786 g·L−1
0.145 g·cm−3
0.125 g·cm−3
Sam-siòng-tiám	2.177 K, ​5.043 kPa
Lîm-kài-tiám	5.1953 K, 0.22746 MPa
Iûⁿ-hoà-jia̍t	0.0138 kJ·mol−1
Cheng-hoat-jia̍t	0.0829 kJ·mol−1
Jia̍t-iông-liōng	20.78 J·mol−1·K−1
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
Goân-chú sèng-chit
Sng-hòa-sò͘	0
Tiān-hū-tō͘	Pauling scale: no data
Tiān-lī-lêng	1st: 2372.3 kJ·mol−1 2nd: 5250.5 kJ·mol−1
Kiōng-kè pòaⁿ-kèng	28 pm
Van der Waals pòaⁿ-kèng	140 pm
Cha̍p-lio̍k
Chiⁿ-thé kò͘-chō	​hexagonal close-packed (hcp)
Siaⁿ-sok	972 m·s−1
Jia̍t-thoân-tō-lu̍t	0.1513 W·m−1·K−1
Chû-sèng	diamagnetic
CAS teng-kì pian-hō	7440-59-7
Le̍k-sú
Hō-miâ	after Helios, Greek god of the Sun
Hoat-hiān	Pierre Janssen, Norman Lockyer (1868)
Siōng chá hû-lî	William Ramsay, Per Teodor Cleve, Abraham Langlet (1895)
Chòe ún-tēng ê tông-ūi-sò͘
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

Helium

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.