What are the variable valencies of oxygen and nitrogen?
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Answer:
Nitrogen can form many oxides with oxygen, and thus is said to exhibit variable valency. Similary, sulphur, phosphours and carbon can exhibit variable valency.
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Explanation:
Oxygen atomic no is 8
configuration of e- (2,6)
it needs two electroms to complete it's octate
therefore it's valency is 2
nitrogen atomic no. 7
configuration ofe-( 2,7)
it needs one electroms to complete it's octate
therefore it's valency is 1
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