question_answer

The wavelengths involved in the spectrum of deuterium \[(_{1}^{2}D)\] are slightly different from that of hydrogen spectrum, because                                                       [AIEEE 2003]

A)            The attraction between the electr on and the nucleus is different in the two cases

B)            The size of the two nuclei are different

C)            The nuclear forces are different in the two cases

D)            The masses of the two nuclei are different