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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Imdadul Haque posted an Question
August 25, 2020 • 13:01 pm
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30 points
30 points
- IIT JAM
- Chemistry (CY)
In which ofthe following pairs, the ionization energy of the first species is less than that of the second (a)n,p (b) be', be (c)n, n (d)s,p
In which ofthe following pairs, the ionization energy of the first species is less than that of the second (a)N,P (b) Be', Be (c)N, N (d)S,P
2 Answer(s)
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Dinesh khalmaniya 1
option D
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Priyanshu kumar Best Answer
Dear student...Option D is correct answer
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Phosphorus has more ionisation potential than sulphur
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In case of phosphorus, it has fully filled ‘p' orbital. Generally, fully filled orbitals are more stable.Hence,we need more energy to remove an electron. In case of sulphur,it has one unpaired electron in' s' orbital.comparatively it is quite easy to remove an electron from ‘s' orbital(since it has only one electron). Thus, phosphorus is having more ionisation energy than sulphur.
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Dinesh khalmaniya 1![best-answer]()
P has higher ionisation energy due to stable half-filled congiguration.
Variation in the period among the representative elements: Ionisation energies generally increase along the period because in moving left to right in a period the effective nuclear charge per outermost electron increases while the corresponding principal quantum number remains same. However, due to half-filled configuration, P has higher IP than S.
got it??