The transition of electron from n = 3 to n = 1 will produce the shortest wave length in
Li2+
H
He+
H+
The maximum number of electrons which can be accommodated in a 'g' subshell is
14
18
32
8
If the speed of electron in the Bohr's first orbit of hydrogen atom is 'V' then the speed of the electron in the fourth orbit is
4V
V/4
V/2
V/16
The wave length of spectral line for an electronic transition is inversely related to
The number of electrons undergoing the transition
The nuclear charge of the atom
The difference in the energy of the energy level involved in the transition
depending upon the valence electrons
The energy difference between the electron in the ground state in hydrogen atom and Be3+ ion is
204 eV
109 eV
27 eV
12 eV
The correct set of quantum numbers for a 5d electron is
5, 2, -2, 0
5, 3, 2, +1/2
5, 2, 1, -1/2
5, 3, -3, +1/2
The product of Δx and Δv is highest for
Neutron
Electron
Proton
α - particle
Isotones are nuclei having
Different atomic numbers
Same mass number
Same number of protons
Same number of neutrons
The de Broglie wave length of a particle of mass 0.5g and velocity 50m/s is
6.626 × 10-31m
2.65 × 10-32 m
2.65 × 10-31 m
none of these
Nitrogen atom does not take the configuration 1s7 because it violates
Hund's rule
Aufbau principle
Heisenberg's uncertainty principle
Pauli exclusion principle
