Question

The ionization potential of lithium and potassium are 5.4 and 4.3ev. What do you predict for the i.p of Na?

Answer 1

ionisation potential is the energy required to remove an electron

lithium has to loose 1 electron

it's ionisation potential is 5.4 ( given)

so in the same way Na (sodium ) has to loose an electron to become stable

so the lithium Nd sodium has nearly same ionisation potential but some difference because of p shell in Na

so ionisation potential of Na -sodium is 5.139

Answer 2

Answer:

$answer\:is \: < 5.4and > 4.3ev$

Because ionization potential is the energy required to remove the outer most electron of a neutral gaseous atom.

size inversely proportional to IP

size Li<Na<K

so IP Li>Na>K

5.4ev>Ip of Na>4.3ev