Question

The energy difference between two successive levels is maximum between:

• A. 1 and 2
• B. 2 and 3
• C. 3 and 4
• D. 4 and 5

Answer 1

The correct option is A 1 and 2

The energy of $n^{th}$ level is $\frac{-13.6z^2}{n^2}eV$

Energy$\propto \frac{1}{n^2}$.

Since the energy is inversely proportional to the square of the orbit number so as the orbit number increases, the energy decreases, thus we can conclude, the energy difference between $2$ successive levels is maximum for first and second.

Hence, the answer is option A.