IIT JEE , AIEEE Forum - Chemistry , Physical Chemistry

varshavallig

2)in the 3rd period no transition elements are present .so there is a sudden decrease in size since v go from s-block to directly p-block.
but in 4th period,there is a steady decrease in the size of d- block elements due filling up of the d orbital of the same quantum no.so there is not much inc.
3)its due to lanthanoid contraction.
4)Al on losing 2e- doesnot go to stable state so high E is req.but Mg gets noble gas config.so less E is req.
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