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Group 9
Period
4 27
 Co 
5 45
 Rh 
6 77
 Ir 
7 109
 Mt 

A Group 9 element is the series of elements in group 9 (IUPAC style) in the periodic table, which consists of the transition metals Cobalt (Co), Rhodium (Rh), Iridium (Ir), and Meitnerium (Mt).

>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


Periodic table

Chemical element groups

Grup 9 de la taula periòdica | 9. skupina | Elemento de grupo 9 | Elementos del grupo 9 | 第9族元素 | ธาตุหมู่ 9

 

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