Q1 Genchem destroyer

[joonkimdds]

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How do we know that As can have 3+, -3, or +5?

do we need to know it for all hundreds of atoms?

 

[nze82]

How do we know that As can have 3+, -3, or +5?

do we need to know it for all hundreds of atoms?

You don't need to know it for all 100 atoms. I think this mostly happens in case of transitional elements, which have multiple oxidation numbers. Stuff like Fe2+ and Fe3+.