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प्रश्न
The first ionisation energy of S is ______ than that of P.
रिकाम्या जागा भरा
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उत्तर
The first ionisation energy of S is less than that of P.
Explanation:
Although sulphur comes after phosphorus in the periodic table, its first ionisation energy is slightly less due to electron-electron repulsion in the paired 3p electrons. This repulsion makes it easier to remove an electron from sulphur than from phosphorus.
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