Question

The value of $IP_{1},IP_{2},IP_{3}$ and $IP_{4}$ of an atom are respectively $7.5eV,25.6eV,48.6eV$ and $170.6eV.$ The electronic configuration of the atom will be :

• A. $1s^{2},2s^{2},2p^{6},3s^{1}$
• B. $1s^{2},2s^{2},2p^{6},3s^{2},3p^{1}$
• C. $1s^{2},2s^{2},2p^{6},3s^{2},3p^{3}$
• D. $1s^{2},2s^{2},2p^{6},3s^{2}$

Answer 1

Answer: (B)

It is observed that there is a sudden jump in the 4th ionization potential value. Hence, there are three valence electrons are present in the valence shell of the given atom.