Published by:
CGP EDU Academic Team
Published on: August 13, 2026
The first ionization enthalpy 
values of the third period elements, 
, and Si are, respectively, 496, 737, and 
. Predict the first ionization enthalpy 
value of Al.
Text Solution
Verified by ExpertsThe correct answer is:
C
First electron to be removed from 
-orbital but, 
higher for Si
IE of Al should be smaller than Mg but higher than Na .
should be correct order ( 
in kJ 
)
Prepare Smarter with CGP Edu
Get practice questions, solutions, and test series in one place.
Write a Review
Share your experience with this question and solution.
Commentary
Send your comment, doubt, correction, or feedback to admin.
Similar Questions
Explore conceptually related problems
The radii of the and are in the order:
Which of the following is not correct for iso-electronic ions?
Which of the following isoelectronic ions has lowest ionisation enthalpy?
The elements which occupy the peaks of ionisation enthalpy curve are
Which out of the following has the largest ionisation enthalpy?
Which of the process requires largest energy among them?