| Cobalt |
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| Atomic Number - | 27 | Melting Point (°C,°F) - | 1495 °C, 2723 °F |
| Atomic Symbol - | Co | Boiling Point (°C,°F) - | 2927 °C, 5301 °F |
| Atomic Mass - | 58.93 | Electron Configuration - | [Ar] 3d7 4s2 |
| Group - | 9 | Electrons Per Shell - | 2, 8, 15, 2 |
| Period - | 4 | Protons - | 27 |
| Series - | Transition Metals | Neutrons - | 32 |
| Block - | f-block | | |
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Element Description - Cobalt is a chemical element in the periodic table that has the symbol Co and atomic number 27. |
Element Characteristics - Cobalt is a hard ferromagnetic silver-white element. The Curie temperature is of 1388 K with 1.6~1.7 Bohr magnetons per atom. It is frequently associated with nickel, and both are characteristic ingredients of meteoric iron. Mammals require small amounts of cobalt salts. Cobalt-60, an artificially produced radioactive isotope of cobalt, is an important radioactive tracer and cancer-treatment agent. Cobalt has a relative permeability two thirds that of iron. Metallic cobalt commonly presents a mixture of two crystallographic structures hcp and fcc with a transition temperature hcp→fcc of 722 K.
Common oxidation states of cobalt include +2, and +3, though +1 is also seen. |
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