how valency of hydrogen can be -1 ? And nitrogen can have valency fom -3 to +5 ?
It is given on every other website !
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Hydrogen-
It has only one electron so to complete its shell it accepts one electron. So, its valency is -1.
Nitrogen-
It completes its first orbit with 2 electron and remains 5 electrons for the next shell. To fill up the shell completely it accepts three electron. So, its valency is -3.
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