Question

The oxidation number of Au metal is​

Answer 1

Oxidation states −3, −2, −1, 0, +1, +2, +3, +5 (an amphoteric oxide)

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Answer 2

Answer:

For gold (Au), the relativistic expansion of its 5d orbitals makes it form high oxidation state compounds. Thus far, the highest oxidation state of Au known is +5.