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 penetr

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:

Accepted Answer

(2) (i), (ii) and (iii). (i) True: the 2p electron of B is easier to remove than the 2s electron of Be. (ii) True: the 2p electron is more shielded by the inner core. (iii) True: 2s penetrates more than 2p. (iv) False: B has a SMALLER atomic radius than Be. So the correct set is (i), (ii), (iii).

Solution

Related JEE Main Chemistry questions