STANDARD Chemistry Ionization Enthalpy Multiple Correct Question
B has a smaller first ionization enthalpy than Be. Consider the following statements (I) It is easier to remove 2p electron than 2s electron. (II) 2p electron of B is more shielded from the nucleus by the inner core of electrons than the 2s electrons of Be. (III) 2s electron has more penetration power than 2p electron (IV) Atomic radius of B is more than Be. (Atomic number B = 5, Be = 4) The correct statements are
(I), (II) and (III)
(II), (III) and (IV)
(I), (III) and (IV)
(I), (II) and (IV)
Correct Answer
Detailed Explanation
B has a smaller size than Be. It is easier to remove 2p electron than 2s electron due to less penetration effect of 2p than 2s. 2p electron of Boron is more shielded from the nucleus by the inner core of electron than the 2s electron of Be.
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