Thó-lūn:Hāi (goân-sò͘)

氦

2 hydrogen ← 氦 → lithium - ↑ He ↓ Ne chiu-kî-pió - Extended Periodic Table
It-poaⁿ sèng-chit
Miâ, Hû-hō, Goân-chú-hoan	氦, He, 2
Hun-lūi	noble gases
Cho̍k, Chiu-kî, Khu	18, 1, s
Goā-hêng	colorless
Goân-chú-liōng	4.002602(2) g/mol
Tiān-chú phoè-tì	1s2
Ta̍k kai ê Tiān-chú	2
Bu̍t-lí sèng-chit
Siòng	gas
Bi̍t-tō͘	(0 °C, 101.325 kPa) 0.1786 g/L
Iûⁿ-tiám	(at 2.5 MPa) 0.95 K (-272.2 °C, -458.0 °F)
Kún-tiám	4.22 K (-268.93 °C, -452.07 °F)
Lîm-kài-tiám	5.19 K, 0.227 MPa
Heat of fusion	0.0138 kJ·mol−1
Khì-hoà-jia̍t	0.0829 kJ·mol−1
Jia̍t-siaⁿ	(25 °C) 20.786 J·mol−1·K−1
Cheng-khì-ap P/Pa 1 10 100 1 k 10 k 100 k at T/K         3 4
Goân-chú sèng-chit
Kiat-chiⁿ kiat-kò͘	hexagonal or bcc
lî-chú-hoà lêng-liōng	1st: 2372.3 kJ/mol
	2nd: 5250.5 kJ/mol
Goân-chú poàⁿ-kèng (calc.)	31 pm
Kiōng-kè poàⁿ-kèng	32 pm
Van der Waals poàⁿ-kèng	140 pm
Kî-thaⁿ sèng-chit
Thoân-jia̍t-lu̍t	(300 K) 151.3 mW·m−1·K−1
CAS hoan-hō	7440-59-7
Ū-miâ ê tông-ūi-sò͘
chham-khó: He ê tông-ūi-sò͘ iso NA poàⁿ-kiám-kî DM DE (MeV) DP 3He 0.000137%* He is stable with 1 neutron 4He 99.999863%* He ū 2 lia̍p tiong-chú ê ún-tēng tông-ūi-sò͘ *Atmospheric value, abundance may differ elsewhere.
Chham-khó

He, helium,抑氦是一種無色，鼻起來、啖起來攏無味的化學元素，是週期表內底無啥活動力的一種華族氣體(noble gas)，原子番2，He的滾點和溶點是全部元素內底上低的，若毋是kaù-te̍k的情形，He定著是氣體，倚絕對零度(absolute zero)的時，He會變成一種超流體(superfluid)，無啥摩擦，性質真特殊。