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Explain the periodic trend of ionisation potential. |
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Answer» Solution :Variation along a period , Ionisation energy usually increases along a period . Thisis DUE to increase of nuclear change and decrease in size as we MOVE from left to right in a period. Periodic variation in GROUP : Ionisation energy decrease down a group. As we move down a group , the valence electron occupies NEW SHELLS, the distance between the nucleus and the valence electron increases . So the nuclear forces of attraction on valence electron decreases and hence ionisation energy also - decreases down a group. |
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