Periodic TableEasy
Question
The element with the highest first ionisation potential is :
Options
A.boron
B.carbon
C.nitrogen
D.oxygen
Solution
N-has half-filled p-subshell, so removal of electron in N will require maximum energy.
N = 1s2, 2s2, 2p3 O = 1s2, 2s2, 2p4
(14.534 eV) (13.618 eV)
C = 1s2, 2s2, 2p2 B = 1s2, 2s2, 2p1
(11.260 eV) (8.298 eV)
N = 1s2, 2s2, 2p3 O = 1s2, 2s2, 2p4
(14.534 eV) (13.618 eV)
C = 1s2, 2s2, 2p2 B = 1s2, 2s2, 2p1
(11.260 eV) (8.298 eV)
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