In Section 3.6, we estimated the effective nuclear charge on
beryllium’s valence electrons to be slightly greater than 2+. What
would a similar treatment predict for the effective nuclear charge
on boron’s valence electrons? Would you expect the effective
nuclear charge to be different for boron’s 2s electrons compared
to its 2p electron? In what way? (Hint: Consider the shape of the
2p orbital compared to that of the 2s orbital.)
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Master Periodic Trend: Effective Nuclear Charge with a bite sized video explanation from Jules Bruno