S Block Elements Question 206

Question: As compared to potassium, sodium has

[MP PMT 1985]

Options:

A) Lower electronegativity

B) Higher ionization potential

C) Greater atomic radius

D) Lower melting point

Show Answer

Answer:

Correct Answer: B

Solution:

Element Na K
$ IE_1 $ 496 419
$ IE_2 $ 4562 3051

Sodium has higher I.E. because of smaller atomic size.