Which one of the following constitutes a group of the isoelectronic species?
Which of the following sets of quantum numbers represents the highest energy of an atom?
According to the Bohr Theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon?
If n = 6, the correct sequence for filling of electrons will be :
The energies E1 and E2 of two radiations are 25 eV and 50 eV, respectively. The relation between their wavelengths i.e., λ1 and λ2 will be :