Question

If the ionisation potential (ip) of Na is 5.48eV . The I.P of k may be​

Answer 1

Answer:

4.34 eV.

The Ionization potential decreases as we move down the group in peeiodic table. This is due to increase in atomic size that reduces attraction force between the nucleus and valance electrons. Moreover, Shielding or Screening effect plays important role to affect Ionization potential.