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Variable Valency

Why does iron...

Question

Why does iron have two valencies?

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Solution

Iron has the tendency to loose 2 as well as 3 electrons hence it shows two valencies (2 and 3) during the formation of compounds.
Reason for this is beyond your syllabus and taught in higher classes.

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Q. Iron and Cooper have dual valency but according to the electron configaratcon Iron should have a valenxv of 2 then why is there a second valency?

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