MCQ
When the excited electron of a $H$ atom from $n =5$ drops to the ground state, the maximum number of emission lines observed are$.......$
- A$15$
- B$16$
- ✓$10$
- D$8$
✓
Answer
Correct option: C.
$10$
c
Maximum number of emission lines from $\mathrm{n}^{\text {th }}$ energy state to ground state is given by:
Maximum number of emission lines from $\mathrm{n}^{\text {th }}$ energy state to ground state is given by:
$=\frac{\mathrm{n}(\mathrm{n}-1)}{2}=\frac{5(5-1)}{2}=\frac{20}{2}=10 \text { lines. }$
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