Chapter 28, Problem 1RQ

To determine

Whether the statement ‘in the hydrogen atom, the energy is specified by the principal quantum number’ is true or false.

Answer to Problem 1RQ

True.

Explanation of Solution

The quantum number that indirectly describes the size of electron orbital is defined as the principal quantum number. It is denoted by $n$, which is an integer value $\left(n=1,2,3,\mathrm{...........}\right)$, but it can never be zero.

The energy of electron is mostly affected by the principal quantum number. The energy level of electron is completely determined by the principal quantum number.

Conclusion:

Thus, the statement ‘in the hydrogen atom, the energy is specified by the principal quantum number’ is true.