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Helium, 2 Spectral lines of helium
Miâ, hû-hō helium, He Gōa-hêng colorless gas, exhibiting a red-orange glow when placed in a high-voltage electric field
Goân-chú-hoan 2 Goân-chú-liōng (±) 4.002602(2)[ 1] 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 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[ 2] −1 −1 cheng-khì-ap 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 Tiān-hū-tō͘ Pauling scale: no data Tiān-lī-lêng 1st: 2372.3 kJ·mol−1 −1 Kiōng-kè pòaⁿ-kèng 28 pm Van der Waals pòaⁿ-kèng 140 pm Chiⁿ-thé kò͘-chō hexagonal close-packed (hcp) Siaⁿ-sok 972 m·s−1 Jia̍t-thoân-tō-lu̍t 0.1513 W·m−1 −1 Chû-sèng diamagnetic [ 3] CAS teng-kì pian-hō 7440-59-7 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) Chú bûn-chiong: helium ê tông-ūi-sò͘
* Atmospheric value, abundance may differ elsewhere
Helium Helium ("Óa-im: "he-lí-ùm 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.
