Question
Question: The wavelengths involved in the spectrum of deuterium \((_{1}^{2}D)\) are slightly different from th...
The wavelengths involved in the spectrum of deuterium (12D) are slightly different from that of hydrogen spectrum because–
A
Sizes of two nuclei are different
B
Nuclear forces are greater in case of Deuterium
C
Masses of the two nuclei are different
D
Force of attraction between electron and nucleus is different in the two cases
Answer
Masses of the two nuclei are different
Explanation
Solution
Consider rotation of nucleus also about common centre of mass of nucleus and electron. We get different values of wavelength depending on mass of nucleus.