Astatine

Astatine (Óa-im: "a-suh-tá-tín") sī 1 ê hoà-ha̍k goân-sò͘. I ê goân-chú-hoan sī 85, hoà-ha̍k hû-hō sī At.

Astatine,  ₈₅At

Ki-pún sèng-chit
Miâ, hû-hō	astatine, At
Gōa-hêng	unknown, probably metallic
Astatine tī chiu-kî-piáu lāi ê ūi-tì
I  ↑ At ↓ Ts polonium ← astatine → radon
Goân-chú-hoan	85
Goân-chú-liōng	(210)
Goân-sò͘ lūi-pia̍t	lūi-kim-sio̍k sometimes classified as a nonmetal, or a metal
Cho̍k, hun-khu	17 cho̍k, p khu
Chiu-kî	tē 6 chiu-kî
Tiān-chú pâi-lia̍t	[Xe] 4f14 5d10 6s2 6p5
per shell	2, 8, 18, 32, 18, 7
Bu̍t-lí sèng-chit
Siòng	kò͘-thé
Iûⁿ-tiám	575 K ​(302 °C, ​576 °F)
Hut-tiám	610 K ​(337 °C, ​639 °F)
Bi̍t-tō͘  (sek-un)	(At2) 6.35±0.15 g·cm−3 (predicted)
Mol thé-chek	(At2) 32.94 cm3·mol−1 (predicted)
Iûⁿ-hoà-jia̍t	ca. 6 kJ·mol−1
Cheng-hoat-jia̍t	(At2) 54.39 kJ·mol−1
cheng-khì-ap P (Pa) 1 10 100 1 k 10 k 100 k tī T (K) 361 392 429 475 531 607
Goân-chú sèng-chit
Sng-hòa-sò͘	−1, +1, +3, +5, +7
Tiān-hū-tō͘	Pauling scale: 2.2
Tiān-lī-lêng	1st: 899.003 kJ·mol−1
Kiōng-kè pòaⁿ-kèng	150 pm
Van der Waals pòaⁿ-kèng	202 pm
Cha̍p-lio̍k
Chiⁿ-thé kò͘-chō	​face-centered cubic (fcc) (predicted)
Jia̍t-thoân-tō-lu̍t	1.7 W·m−1·K−1
CAS teng-kì pian-hō	7440-68-8
Le̍k-sú
Hō-miâ	after Greek astatos (αστατος), meaning "unstable"
Hoat-hiān	Dale R. Corson, Kenneth Ross MacKenzie, Emilio Segrè (1940)
Chòe ún-tēng ê tông-ūi-sò͘
Chú bûn-chiong: astatine ê tông-ūi-sò͘
iso NA half-life DM DE (MeV) DP 209At syn 5.41 h β+ 3.486 209Po α 5.758 205Bi 210At syn 8.1 h β+ 3.981 210Po α 5.632 206Bi 211At syn 7.21 h ε 0.786 211Po α 5.983 207Bi