If of energy is supplied to a hydrogen atom in its ground state, the number of spectral lines emitte — Atomic Structure Chemistry Question

💡 Solution & Explanation

The minimum energy required to excite a hydrogen atom from the ground state ($n=1$) to the first excited state ($n=2$) is $10.2 \text{ eV}$. Since $9.9 \text{ eV}$ is insufficient, no transition occurs and $0$ lines are emitted.