Cobalt

Cobalt sī 1 ê hoà-ha̍k goân-sò͘. I ê goân-chú-hoan sī 27, hoà-ha̍k hû-hō sī Co.

Cobalt,  ₂₇Co

electrolytically refined cobalt chips
Ki-pún sèng-chit
Miâ, hû-hō	cobalt, Co
Gōa-hêng	hard lustrous gray metal
Cobalt tī chiu-kî-piáu lāi ê ūi-tì
– ↑ Co ↓ Rh thih ← cobalt → nikel
Goân-chú-hoan	27
Goân-chú-liōng (±)	58.933194(4)[1]
Goân-sò͘ lūi-pia̍t	kòe-tō͘ kim-sio̍k
Cho̍k, hun-khu	9 cho̍k, d khu
Chiu-kî	tē 4 chiu-kî
Tiān-chú pâi-lia̍t	[Ar] 3d7 4s2
per shell	2, 8, 15, 2
Bu̍t-lí sèng-chit
Sek-chhái	metallic gray
Siòng	kò͘-thé
Iûⁿ-tiám	1768 K ​(1495 °C, ​2723 °F)
Hut-tiám	3200 K ​(2927 °C, ​5301 °F)
Bi̍t-tō͘  (sek-un)	8.90 g·cm−3
8.86 g·cm−3
Iûⁿ-hoà-jia̍t	16.06 kJ·mol−1
Cheng-hoat-jia̍t	377 kJ·mol−1
Jia̍t-iông-liōng	24.81 J·mol−1·K−1
cheng-khì-ap P (Pa) 1 10 100 1 k 10 k 100 k tī T (K) 1790 1960 2165 2423 2755 3198
Goân-chú sèng-chit
Sng-hòa-sò͘	−3, −1, +1, +2, +3, +4, +5[2] ​(an amphoteric oxide)
Tiān-hū-tō͘	Pauling scale: 1.88
Tiān-lī-lêng	1st: 760.4 kJ·mol−1 2nd: 1648 kJ·mol−1 3rd: 3232 kJ·mol−1 (more)
Goân-chú pòaⁿ-kèng	empirical: 125 pm
Kiōng-kè pòaⁿ-kèng	Low spin: 126±3 pm High spin: 150±7 pm
Cha̍p-lio̍k
Chiⁿ-thé kò͘-chō	​hexagonal close-packed (hcp)
Siaⁿ-sok (sòe kùn-á)	4720 m·s−1 (at 20 °C)
Jia̍t-phòng-tiòng	13.0 µm·m−1·K−1 (at 25 °C)
Jia̍t-thoân-tō-lu̍t	100 W·m−1·K−1
Tiān-chó͘-lu̍t	62.4 nΩ·m (at 20 °C)
Chû-sèng	ferromagnetic
Young hē-sò͘	209 GPa
Shear hē-sò͘	75 GPa
Bulk hē-sò͘	180 GPa
Poisson pí	0.31
Mohs ngē-tō͘	5.0
Vickers ngē-tō͘	1043 MPa
Brinell ngē-tō͘	470–3000 MPa
CAS teng-kì pian-hō	7440-48-4
Le̍k-sú
Hoat-hiān	Georg Brandt (1732)
Chòe ún-tēng ê tông-ūi-sò͘
Chú bûn-chiong: cobalt ê tông-ūi-sò͘
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