Questions
Among the III A group elements, the difference in the atomic radius is large in between
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Correct option is A
B - 1s2 2s2 2p1Al - 1s2 2s2 2p6 3s23p1From B to Al as the number of inner shell s and p- orbital electrons increases,shielding effect increases .Since s and p-orbital electrons acts as strong screens hence they can protect the valency electrons from the nucleus effectively,so nuclear forces of attractions on valency electrons decreases,therfore size increases largely from B to Al.Similar Questions
The bond dissociation energy of BF bond in BF3 is 646 kJ mol–1 whereas that of CF in CF4 is 315 kJ mol–1. The correct reason for higher BF bond dissociation energy as compared to that of CF bond is :
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