A) hydrogen atom
B) deuterium atom
C) singly ionized helium
D) doubly ionized helium
E) doubly ionized lithium
Correct Answer: E
Solution :
\[\frac{1}{\lambda }={{Z}^{2}}R\left( \frac{1}{{{1}^{2}}}-\frac{1}{{{2}^{2}}} \right)\] Hence,\[\lambda \]is minimum when, Z is maximum.
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