Question

The maximum oxidation state of osmium is ______.

Options

• +6

• +7

• +8

• +5

Answer 1

The maximum oxidation state of osmium is +8.

Explanation:

Osmium is a transition element that belongs to the 3rd transition series. It shows variable oxidation states due to the involvement of its d-electrons in bonding. The highest known oxidation state of osmium is +8, as seen in osmium tetroxide (OsO₄), where it forms covalent bonds with oxygen atoms. This is the maximum oxidation state shown by any element.