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The first ionization potential (IP) of t...

The first ionization potential (IP) of the elements Na, Mg, Si, P, Cl and Ar are 5.14, 7.65, 8.15, 10.49, 12.97 and 15.76 eV, respectively. The IP (in eV) of K is closest to :

A

13.3

B

18.2

C

4.3

D

6.4

Text Solution

Verified by Experts

The correct Answer is:
C
The first ionisation potential of K is less than Na.
`therefore` The first ionization potential of K is closest to 4.3
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