Question

oxidation number of gold Au
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Answer 1

Answer:

+5

Step-by-step explanation:

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. Here, we propose high pressure as a controllable method for preparing +4 and +6 oxidation states in Au via its reaction with fluorine.

Answer 2

Answer:

+3

+3It's not obvious, but common oxidation state for gold is +3. It caused by destabilization of the 5d10 orbital. 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. Here, we propose high pressure as a controllable method for preparing +4 and +6 oxidation states in Au via its reaction with fluorine.