Question

The principal quantum number increases, the difference of energy between consecutive energy levels :

• A. Decreases
• B. Increases
• C. Remaining the same
• D. Sometimes increases and sometimes decreases

Answer 1

Answer: (A)

Decreases

As the principle quantum number increases, the difference between the consecutive energy level decreases as $E=\frac{-1.36z^2}{n^2}eV$

i.e., $E\propto \frac{1}{n^2}$

So when value of principal quantum number increases then difference in energy decreases.