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CGP EDU Academic Team
Published on: August 14, 2026
Following table shows the successive molar ionisation energy (Kl mol –1 ) of five elements A to E.
Ionisation energy (kJ/mol –1 )
Element 1st 2nd 3rd 4th
A 2080 4000 6100 9400
B 500 4600 6900 9500
C 740 1500 7700 10500
D 580 1800 2700 11600
E 420 3100 4400 5900
Which two elemetns are most likely to be in the same group of the periodic table?
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Verified by ExpertsThe correct answer is:
D
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