कोबाल्ट तत्व के बारे में जानकारी (Information about Cobalt element)
Cobalt
01. 1st ionization energy [eV] → 7.881
02. 2nd ionization energy [eV] → 17.06
03. 3rd ionization energy [eV] → 33.5
04. Atomic number → 27
05. Atomic radius [pm] → 152
06. Boiling point [°C] → 2900
07. Brinell hardness [MPa] → 700
08. Covalent radius [pm] → 126
09. Density [g/cm3] → 8.9
10. Discovery → 1735
11. Electrical conductivity [S m-1] → 1.7 • 10^7
12. Electron configuration → 1s2 2s2 2p6 3s2 3p6 3d7 4s2
13. Electronegativity → 1.8
14. Element category → Transition elements
15. Group → VIII.B
16. Hardness [Mohs scale] → 5.5
17. Heat capacity [J K-1g-1] → 0.421
18. Latin name → Cobaltum
19. Melting point [°C] → 1494
20. Oxidation numbers → 2, 3
21. Period → 4
22. Relative atomic mass → 58.9332
23. Shear modulus [GPa] → 75
24. Stable isotopes → 1
25. State → Solid
26. Symbol → Co
27. Thermal conductivity [W m-1K-1] → 100
28. Unstable isotopes → 13
29. Vickers hardness [MPa] → 1043
30. Young's modulus [GPa] → 209
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