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I need help understanding oxidation I have a problem that states:

The proper assignment of oxidation numbers to the elements in the compound LiAsO3 would be:

I think the answer is +1 for Li, +3 for As and -2 for O.

I think I am confusing oxidation with ionic charge.

PLEASE HELP

1 answer

Li is right as is O. As is not right. As is +5
Here is a good site that explains how to do oxidation numbers.
http://www.chemteam.info/Redox/Redox-Rules.html
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