Answers

2016-02-11T10:43:23+05:30
If The Element X has atomic No.9 so its Electronic Configuration Is 2,7 So to get Stable Electronic Configuration [Octet Rule 2,8] It has to gain One Electron So it has to receive One Electron So its Valency is -1

If An Element Is Donating Electron Den its Valency would be in Positive
But
If An Element Is Receiving Electron Den its Valency would be in Negative

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