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In boron family, ionisation Enthalpy decreases irregularly
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In boron family
In Ga, d electrons are involved in screening and in Tl f electrons are involved in screening
Screening effect of d and f are less effective
In Ga, d electrons are involved in screening and in Tl f electrons are involved in screening
Screening effect of d and f are less effective
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in boron family some are metal like alluminium and some are semi metal there fore ionisation enthalpy decrease irrgularly and due to ineart pair effect
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