Atoms And Nuclei Question 61
Question: An ionic atom equivalent to hydrogen atom has wavelength equal to 1/4 of the wavelengths of hydrogen lines. The ion will be [RPET 1997]
Options:
A) $ H{{e}^{+}} $
B) $ L{{i}^{++}} $
C) $ N{{e}^{9+}} $
D) $ N{{a}^{10+}} $
Show Answer
Answer:
Correct Answer: A
Solution:
$ \bar{\nu }\propto \frac{1}{\lambda }\propto Z^{2}\Rightarrow \lambda Z^{2}= $ constant
$ \Rightarrow \lambda =\frac{\lambda }{4}Z^{2}\Rightarrow Z=2 $
