Cobalt

Cobalt,  ₂₇Co

ngoi-kôn
hard lustrous gray metal electrolytically refined cobalt chips
Kî-pún sin-sit
Miàng, fù-ho	Cobalt, Co
ngoi-hìn	hard lustrous gray metal
Cobalt chhai chû-khì-péu ke vi-chi
– ↑ Co ↓ Rh thiet ← Cobalt → nickel
ngièn-chṳ́ sì-sú	27
ngièn-chṳ́-liòng (±)	58.933194(4)
ngièn-su lui-phe̍t	ko-thu kîm-su̍k
Chhu̍k, fûn-khî	9 chhu̍k, d-block
chû-khì	period 4
thien-chṳ́ phài-lie̍t	[Ar] 3d7 4s2
per shell	2, 8, 15, 2
vu̍t-lî sin-chṳt
ngân-set	metallic gray
Siông	ku-thí
yùng-tiám	1768 K ​(1495 °C, ​2723 °F)
pui-tiám	3200 K ​(2927 °C, ​5301 °F)
Me̍t-thu near Sit-vûn	8.90 g·cm−3
8.86 g·cm−3
Yùng-fa-ngie̍t	16.06 kJ·mol−1
Chîn-fat-ngie̍t	377 kJ·mol−1
Ngie̍t-yùng-liong	24.81 J·mol−1·K−1
chîn-hi-ap P (Pa) 1 10 100 1 k 10 k 100 k chhai T (K) 1790 1960 2165 2423 2755 3198
Ngièn-chṳ́ sin-chṳt
Yông-fa-su	−3, −1, +1, +2, +3, +4, +5 ​(an amphoteric oxide)
Thien-fu-sin	Pauling scale: 1.88
Thien-lì-nèn	1st: 760.4 kJ·mol−1 2nd: 1648 kJ·mol−1 3rd: 3232 kJ·mol−1 (more)
Ngièn-chṳ́ pan-kang	empirical: 125 pm
Khiung-ka pan-kang	Low spin: 126±3 pm High spin: 150±7 pm
Miscellanea
Chîn-thí keu-chho	​hexagonal close-packed (hcp)
Sâng-suk thin rod	4720 m·s−1 (at 20 °C)
Ngie̍t-phàng-chong	13.0 µm·m−1·K−1 (at 25 °C)
Ngie̍t-chhòn-thô-li̍t	100 W·m−1·K−1
Thien-chú-li̍t	62.4 nΩ·m (at 20 °C)
Chhṳ̀-sin	ferromagnetic
Young's modulus	209 GPa
Shear modulus	75 GPa
Bulk modulus	180 GPa
Poisson ratio	0.31
Mohs hardness	5.0
Vickers hardness	1043 MPa
Brinell hardness	470–3000 MPa
CAS Registry Number	7440-48-4
Le̍k-sú
Fat-hien	Georg Brandt (1732)
Chui vún-thin ke thùng-vi-su
Chú vùn-chông: Cobalt ke thùng-vi-su
iso NA half-life DM DE (MeV) DP 56Co syn 77.27 d ε 4.566 56Fe 57Co syn 271.79 d ε 0.836 57Fe 58Co syn 70.86 d ε 2.307 58Fe 59Co 100% 59Co is stable with 32 neutrons 60Co syn 5.2714 y β−, γ 2.824 60Ni

Cobalt (Hon-ngî: 鈷 gǔ) he yit-tsúng Fa-ho̍k Ngièn-su, fa-ho̍k fù-ho vì Co, ngièn-tsṳ́ su-muk he 27, tshai Ngièn-su Tsû-khì péu chûng thi ngi-sṳ̍p-chhit vi.