B has a smaller first ionization enthalpy than Be. \( \mathrm{P} \)...
B has a smaller first ionization enthalpy than Be.
\( \mathrm{P} \) Consider the following statements :
W)
[JEE Main-2020(January)]
(I) It is easier to remove \( 2 p \) electron than \( 2 s \) electron
(II) \( 2 \mathrm{p} \) electron of \( \mathrm{B} \) is more shielded from the nucleus by the inner core of electrons than the 2 s electrons of \( \mathrm{Be} \)
(III) \( 2 \mathrm{~s} \) electron has more penetration power than \( 2 \mathrm{p} \) electron
(IV) atomic radius of \( \mathrm{B} \) is more than \( \mathrm{Be} \)
(atomic number \( \mathrm{B}=5, \mathrm{Be}=4 \) )
The correct statement are :
(1) (I), (III) and (IV)
(2) (II), (III) and (IV)
(3)(I), (II) and (IV)
(4) (I), (II) and (III)
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