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Cobalt, 27Co
![](//upload.wikimedia.org/wikipedia/commons/thumb/a/a8/Kobalt_electrolytic_and_1cm3_cube.jpg/220px-Kobalt_electrolytic_and_1cm3_cube.jpg)
electrolytically refined cobalt chips |
Ki-pún sèng-chit |
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Miâ, hû-hō |
cobalt, Co |
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Gōa-hêng |
hard lustrous gray metal |
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Cobalt tī chiu-kî-piáu lāi ê ūi-tì |
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Goân-chú-hoan |
27 |
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Goân-chú-liōng (±) |
58.933194(4)[1] |
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Goân-sò͘ lūi-pia̍t |
kòe-tō͘ kim-sio̍k |
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Cho̍k, hun-khu |
9 cho̍k, d khu |
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Chiu-kî |
tē 4 chiu-kî |
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Tiān-chú pâi-lia̍t |
[Ar] 3d7 4s2 |
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per shell |
2, 8, 15, 2 |
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Bu̍t-lí sèng-chit |
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Sek-chhái |
metallic gray |
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Siòng |
kò͘-thé |
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Iûⁿ-tiám |
1768 K (1495 °C, 2723 °F) |
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Hut-tiám |
3200 K (2927 °C, 5301 °F) |
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Bi̍t-tō͘ (sek-un) |
8.90 g·cm−3 |
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8.86 g·cm−3 |
Iûⁿ-hoà-jia̍t |
16.06 kJ·mol−1 |
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Cheng-hoat-jia̍t |
377 kJ·mol−1 |
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Jia̍t-iông-liōng |
24.81 J·mol−1·K−1 |
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cheng-khì-ap
P (Pa)
|
1
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10
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100
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1 k
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10 k
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100 k
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tī T (K)
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1790
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1960
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2165
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2423
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2755
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3198
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Goân-chú sèng-chit |
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Sng-hòa-sò͘ |
−3, −1, +1, +2, +3, +4, +5[2] (an amphoteric oxide) |
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Tiān-hū-tō͘ |
Pauling scale: 1.88 |
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Tiān-lī-lêng |
1st: 760.4 kJ·mol−1 2nd: 1648 kJ·mol−1 3rd: 3232 kJ·mol−1 (more) |
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Goân-chú pòaⁿ-kèng |
empirical: 125 pm |
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Kiōng-kè pòaⁿ-kèng |
Low spin: 126±3 pm High spin: 150±7 pm |
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Cha̍p-lio̍k |
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Chiⁿ-thé kò͘-chō |
hexagonal close-packed (hcp) |
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Siaⁿ-sok (sòe kùn-á) |
4720 m·s−1 (at 20 °C) |
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Jia̍t-phòng-tiòng |
13.0 µm·m−1·K−1 (at 25 °C) |
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Jia̍t-thoân-tō-lu̍t |
100 W·m−1·K−1 |
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Tiān-chó͘-lu̍t |
62.4 nΩ·m (at 20 °C) |
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Chû-sèng |
ferromagnetic |
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Young hē-sò͘ |
209 GPa |
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Shear hē-sò͘ |
75 GPa |
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Bulk hē-sò͘ |
180 GPa |
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Poisson pí |
0.31 |
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Mohs ngē-tō͘ |
5.0 |
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Vickers ngē-tō͘ |
1043 MPa |
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Brinell ngē-tō͘ |
470–3000 MPa |
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CAS teng-kì pian-hō |
7440-48-4 |
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Le̍k-sú |
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Hoat-hiān |
Georg Brandt (1732) |
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Chòe ún-tēng ê tông-ūi-sò͘ |
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Chú bûn-chiong: cobalt ê tông-ūi-sò͘ |
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Cobalt sī 1 ê hoà-ha̍k goân-sò͘. I ê goân-chú-hoan sī 27, hoà-ha̍k hû-hō sī Co.