Group 9 element

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Notion

Domain

Science and technology

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What Wikipedia says

Group 9, by modern IUPAC numbering, is a group (column) of chemical elements in the d-block of the periodic table. Members of Group 9 include cobalt (Co), rhodium (Rh), iridium (Ir) and meitnerium (Mt).

Excerpt from the Wikipedia article “Group 9 element”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Alchemist-hp (talk) (www.pse-mendelejew.de), FAL, via Wikimedia Commons.