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Which among the following elements have ...

Which among the following elements have lowest value of `IE_1`?

A

Pb

B

Sn

C

Si

D

C

Text Solution

Verified by Experts

The correct Answer is:
B
The ionisation energy of tin {Sn} is less than that of lead (Pb). It is due to the poor shielding of d- and felectron in Pb due to which it feels greater attraction from nucleus.
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