1.

The first ionisation potential in electron volts of nitrogen and oxygen atoms are respectively given by(a) 14.6, 13.6 (b) 13.6. 14.6(c) 13.6, 13.6(d) 14.6, 14.6 

Answer»

Correct option (a) 14.6, 13.6 

Explanation:

The first ionisation potential of l{ > O because of extra stability gained by half-filled  p-orbitals of N.

N7 = 1s2, 2s2, 2p1x, 2py1 , 2p1z

O8 = 1s2, 2s2, 2p2x, 2py1 , 2p1z



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