Astatine

Astatine (Hon-ngî: 砈 è fe̍t-chá 砹 ài) he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì At, ngièn-chṳ́ su-muk he 85.

Astatine,  ₈₅At

ngoi-kôn
unknown, probably metallic
Kî-pún sin-sit
Miàng, fù-ho	Astatine, At
ngoi-hìn	unknown, probably metallic
Astatine chhai chû-khì-péu ke vi-chi
I  ↑ At ↓ Ts polonium ← Astatine → radon
ngièn-chṳ́ sì-sú	85
ngièn-chṳ́-liòng	(210)
ngièn-su lui-phe̍t	lui-kîm-su̍k, sometimes classified as a nonmetal, or a metal[1][2]
Chhu̍k, fûn-khî	17 chhu̍k, p-block
chû-khì	period 6
thien-chṳ́ phài-lie̍t	[Xe] 4f14 5d10 6s2 6p5
per shell	2, 8, 18, 32, 18, 7
vu̍t-lî sin-chṳt
Siông	ku-thí
yùng-tiám	575 K ​(302 °C, ​576 °F)
pui-tiám	610 K ​(337 °C, ​639 °F)
Me̍t-thu near Sit-vûn	(At2) 6.35±0.15 g·cm−3 (predicted)[3]
Mol thí-chit	(At2) 32.94 cm3·mol−1 (predicted)[3]
Yùng-fa-ngie̍t	ca. 6 kJ·mol−1
Chîn-fat-ngie̍t	(At2) 54.39 kJ·mol−1[4]
chîn-hi-ap P (Pa) 1 10 100 1 k 10 k 100 k chhai T (K) 361 392 429 475 531 607
Ngièn-chṳ́ sin-chṳt
Yông-fa-su	−1, +1, +3, +5, +7[5]
Thien-fu-sin	Pauling scale: 2.2
Thien-lì-nèn	1st: 899.003 kJ·mol−1[6]
Khiung-ka pan-kang	150 pm
Van der Waals pan-kang	202 pm
Miscellanea
Chîn-thí keu-chho	​face-centered cubic (fcc) (predicted)[2]
Ngie̍t-chhòn-thô-li̍t	1.7 W·m−1·K−1
CAS Registry Number	7440-68-8
Le̍k-sú
Hí-miàng	after Greek astatos (αστατος), meaning "unstable"
Fat-hien	Dale R. Corson, Kenneth Ross MacKenzie, Emilio Segrè (1940)
Chui vún-thin ke thùng-vi-su
Chú vùn-chông: Astatine ke thùng-vi-su
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