Beryllium

Beryllium (Hon-ngî: 鈹 pí) he yit-chúng fa-ho̍k ngièn-su, fa-ho̍k fù-ho vì Be, ngièn-chṳ́ su-muk he 4, chhai ngièn-su chû-khì-péu lî-tú phài thi 4 vi.

Beryllium,  ₄Be

ngoi-kôn
white-gray metallic
Kî-pún sin-sit
Miàng, fù-ho	Beryllium, Be
ngoi-hìn	white-gray metallic
Beryllium chhai chû-khì-péu ke vi-chi
– ↑ Be ↓ Mg Lithium ← Beryllium → Phìn
ngièn-chṳ́ sì-sú	4
ngièn-chṳ́-liòng (±)	9.0121831(5)
ngièn-su lui-phe̍t	kán-thú kîm-su̍k
Chhu̍k, fûn-khî	2 chhu̍k, s-block
chû-khì	period 2
thien-chṳ́ phài-lie̍t	[He] 2s2
per shell	2, 2
vu̍t-lî sin-chṳt
Siông	ku-thí
yùng-tiám	1560 K ​(1287 °C, ​2349 °F)
pui-tiám	2742 K ​(2469 °C, ​4476 °F)
Me̍t-thu near Sit-vûn	1.85 g·cm−3
1.690 g·cm−3
lìm-kie-tiám	5205 K,  MPa (extrapolated)
Yùng-fa-ngie̍t	12.2 kJ·mol−1
Chîn-fat-ngie̍t	292 kJ·mol−1
Ngie̍t-yùng-liong	16.443 J·mol−1·K−1
chîn-hi-ap P (Pa) 1 10 100 1 k 10 k 100 k chhai T (K) 1462 1608 1791 2023 2327 2742
Ngièn-chṳ́ sin-chṳt
Yông-fa-su	+2, +1 ​(an amphoteric oxide)
Thien-fu-sin	Pauling scale: 1.57
Thien-lì-nèn	1st: 899.5 kJ·mol−1 2nd: 1757.1 kJ·mol−1 3rd: 14,848.7 kJ·mol−1 (more)
Ngièn-chṳ́ pan-kang	empirical: 112 pm
Khiung-ka pan-kang	96±3 pm
Van der Waals pan-kang	153 pm
Miscellanea
Chîn-thí keu-chho	​hexagonal close-packed (hcp)
Sâng-suk thin rod	12,890 m·s−1 (at r.t.)
Ngie̍t-phàng-chong	11.3 µm·m−1·K−1 (at 25 °C)
Ngie̍t-chhòn-thô-li̍t	200 W·m−1·K−1
Thien-chú-li̍t	36 nΩ·m (at 20 °C)
Chhṳ̀-sin	diamagnetic
Young's modulus	287 GPa
Shear modulus	132 GPa
Bulk modulus	130 GPa
Poisson ratio	0.032
Mohs hardness	5.5
Vickers hardness	1670 MPa
Brinell hardness	590–1320 MPa
CAS Registry Number	7440-41-7
Le̍k-sú
Fat-hien	Louis Nicolas Vauquelin (1797)
First isolation	Friedrich Wöhler & Antoine Bussy (1828)
Chui vún-thin ke thùng-vi-su
Chú vùn-chông: Beryllium ke thùng-vi-su
iso NA half-life DM DE (MeV) DP 7Be trace 53.12 d ε 0.862 7Li γ 0.477 – 9Be 100% 9Be is stable with 5 neutrons 10Be trace 1.36×106 y β− 0.556 10B