کوبالټ (په انگرېزي: Cobalt) له کیمیاوي عناصرو څخه یو دی چې په تناوبي جدول کې د Co سمبول او ۲v اتمي شمېرې په وسیله ښودل شوی دی.
چټک مالومات عمومي خواص, Pronunciation ...
Cobalt, 27Co electrolytically refined cobalt chips |
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| Pronunciation | /ˈkoʊbɒlt/[۱]
KOH-bolt |
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| Appearance | hard lustrous bluish gray metal |
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| اټومي شمیره (Z) | 27 |
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| گروپ, پیریود | group 9, period 4 |
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| بلاک | d-block |
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| Element category | transition metal |
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| معياري اټومي وزن (Ar) | کينډۍ:Val[۲] |
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| Electron configuration | [Ar] 3d7 4s2 |
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Electrons per shell | 2, 8, 15, 2 |
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| Color | metallic gray |
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| حالت (at STP) | جامد |
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| دويلې کيدو ټکى | 1768 K (1495 °C, 2723 °F) |
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| يشنا ټکی | 3200 K (2927 °C, 5301 °F) |
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| Density near r.t. | 8.90 g/cm3 |
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| when liquid, at m.p. | 8.86 g/cm3 |
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| Heat of fusion | 16.06 kJ/mol |
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| Heat of vaporization | 377 kJ/mol |
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| Molar heat capacity | 24.81 J/(mol·K) |
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Vapor pressure
| P (Pa) |
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at T (K) |
1790 |
1960 |
2165 |
2423 |
2755 |
3198 |
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| Oxidation states | −3, −1, +1, +2, +3, +4, +5[۳] (an amphoteric oxide) |
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| Electronegativity | Pauling scale: 1.88 |
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| Ionization energies | - 1st: 760.4 kJ/mol
- 2nd: 1648 kJ/mol
- 3rd: 3232 kJ/mol
- (more)
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| Atomic radius | empirical: 125 pm |
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| Covalent radius | Low spin: 126±3 pm
High spin: 150±7 pm |
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| Crystal structure | hexagonal close-packed (hcp) Hexagonal close packed crystal structure for cobalt |
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| Speed of sound thin rod | 4720 m/s (at 20 °C) |
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| Thermal expansion | 13.0 µm/(m·K) (at 25 °C) |
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| د تودوخې تېرېدنه | 100 W/(m·K) |
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| Electrical resistivity | 62.4 nΩ·m (at 20 °C) |
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| Magnetic ordering | ferromagnetic |
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| Young's modulus | 209 GPa |
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| Shear modulus | 75 GPa |
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| Bulk modulus | 180 GPa |
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| Poisson ratio | 0.31 |
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| Mohs hardness | 5.0 |
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| Vickers hardness | 1043 MPa |
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| Brinell hardness | 470–3000 MPa |
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| CAS Number | 7440-48-4 |
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| Discovery and first isolation | Georg Brandt (1735) |
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| آيسوټوپ |
Abundance |
نیم ژوند (t1/2) |
Decay mode |
Product |
| 56Co |
syn |
77.27 d |
ε |
56Fe |
| 57Co |
syn |
271.79 d |
ε |
57Fe |
| 58Co |
syn |
70.86 d |
ε |
58Fe |
| 59Co |
100% |
stable |
| 60Co |
syn |
5.2714 y |
β−, γ |
60Ni |
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| | references | in Wikidata |
تړل
