Question

First ionisation enthalpy of boron is less than that of carbon

Answer 1

Hello friend...

1s^2, 2s^2,2p^1. The answer to the first question is very simple.The size of a carbon atom is smaller than boron.So the Valence electron of carbon faces a greater nuclear force( nuclear charge) than that of boron.In order to break that,carbon needs greater energy ,hence the first I.E of carbon is higher.

Hope this helps you...

Answer 2

The size of a carbon atom is smaller than boron.So the Valence electron of carbon faces a greater nuclear force( nuclear charge) than that of boron.In order to break that,carbon needs greater energy ,hence the first I.E of carbon is higher.

Hope it helps you
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