In comparison to boron, berylium has :

Question:

In comparison to boron, berylium has :

  1. lesser nuclear charge and lesser first ionisation enthalpy.

  2. greater nuclear charge and lesser first ionisation enthalpy.

  3. greater nulear charge and greater first ionisation enthalpy.

  4.  lesser nuclear charge and greater first ionisation enthalpy.

Correct Option: , 4

Solution:

Nuclear charge : $\mathrm{B}>\mathrm{Be}$

$\mathrm{Be}=1 s^{2} 2 s^{2}$                (more stable)

$\mathrm{~B}=1 s^{2} 2 s^{2} 2 p^{1}$

$\therefore$ Ionisation energy of Be is greater than B due to $n s^{2}$ outer electronic configuration.

Leave a comment

Close

Click here to get exam-ready with eSaral

For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.

Download Now

eSaral Gurukul

NEET

JEE Main

JEE Advanced

Our Telegram Channel

All Study Material