Group 9 element
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| 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
ar:عناصر المجموعة التاسعة ca:Grup 9 de la taula periòdica cs:9. skupina de:Cobaltgruppe eo:Elemento de grupo 9 ko:9족 원소 it:Elementi del gruppo 9 lmo:Grupp 9 de la taula periòdica sk:9. skupina sr:9. група хемијских елемената sh:9. grupa hemijskih elemenata th:ธาตุหมู่ 9