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Cobalt family
Introduction
| Group | 9 |
|---|---|
| Period | |
| 4 | 27 Co |
| 5 | 45 Rh |
| 6 | 77 Ir |
| 7 | 109 Mt |
In modern IUPAC nomenclature, Group 9 of the periodic table contains the elements cobalt (Co), rhodium (Rh), iridium (Ir), and meitnerium (Mt). These are all d-block transition metals. All known isotopes of Mt are radioactive with short half-lives, and it is not known to occur in nature; only minute quantities have been synthesized in laboratories.
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| Explanation of right side periodic table slice: | Transition metals | atomic number in black are solids | solid borders are older than the Earth (Primordial elements) | dashed borders have no isotopes older than the earth |
Applications
- Alloys with other metals, primarially to add corrosion and wear resistance
- Industrial Catalysts
- Superalloys
- Electrical Components
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