Home Chemistry Classification of Elements and Periodicity Ionisation Energy Which among the following elements have lowe…
Chemistry Classification of Elements and Periodicity Ionisation Energy Single Correct MCQ
Published on: August 12, 2026

Which among the following elements have lowest value of IE 1 ?

A
Pb
B
Sn
C
Si
D
C

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The correct answer is:
B

The ionisation energy of Tin (Sn) is less than that of lead (Pb) It is due to the poor sheilding of d- and f- electron in Pb, due to which it feels greater attraction from nucleus.

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