Classification Of Elements And Periodicity In Properties Question 73
Question: Which among the following elements have lowest value of $ IE_1 $ [CPMT 2004]
Options:
Pb
Sn
Si
C
Show Answer
Answer:
Correct Answer: B
Solution:
The ionisation energy of tin {Sn} is less than that of lead (Pb). It is due to the poor shielding of d- and f-electrons in Pb due to which it feels greater attraction from the nucleus.
BETA
