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Arrange the following species in increasing order of their 1st ionization
enthalpies.
A - 1s²2s²2p 3s B - 1s 2s 2p 3s C-1s 2s 2p
D-1s 2s²2p E - 1s²2s²2p
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(a) Cl- < Ar < < K+ became nuclear change goes on increasing,
(b) Na < Al < Mg because Mg has stable electronic configuration and Na has large atomic size due to which it has lowest ionization energy,
(c) C < O < N because N has half filled p-orbita which is more stable whereas carbon is larger in size.
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