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When is the oxidation state of metal indicated in the name of a compound

User Ken Labso
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Answer:

When the metal can exist in more than one oxidation state

Step-by-step explanation:

When metal exhibit more than one oxidation sate, we have to write the oxidation number of the metal in front of it to for a better clarity. Most of the transition metals exhibit more than one oxidation state due to presence of d electrons. For example the oxidation state of iron are "+2 and +3"

The oxidation state of copper are "+1 and +2"

The oxidation state of Mn are :"+2", +4, +7. so we generally write there oxidation state in roman For Mn compound in +2 oxidation state we write Mn(II) For Mn compound in +7 oxidation state we write Mn(VII)

User Jasongetsdown
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