Common based on their location in Periodic Table;
Potassium has an atomic number 19. Its electronic configuration is as follow;
1s², 2s², 2p⁶, 3s², 3p⁶, 4s¹
And Krypton has an atomic number of 36. Its electronic configuration is as follow;
1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶
It is concluded that both Potassium and Krypton has their valence electrons in 4rth shell or they have same Principle Quantum Number.
Difference based on their location in Periodic Table;
As observed in electronic configuration Potassium has one valence electron in its valence shell (i.e. 4s¹) while, Krypton has eight valence electrons in its valence shell (i.e. 4s², 4p⁶). Therefore, they are different in the number of valence electrons.
