Two electrons in the same atomic orbital can be distinguished by their
Principle quantum number
Azimuthal quantum number
Magnetic quantum number
Spin quantum number
The observation that the ground state of nitrogen atom has 3 unpaired electrons in its electronic configuration is associated with
Heisenberg's uncertainty principle
Pauli's exclusion principle
Aufbau principle
Hund's rule of maximum multiplicity
A d- orbital can accommodate
10 electrons
5 electrons
2 electrons with parallel spin
2 electrons with opposite spin
The maximum kinetic energy of photo electrons ejected from a metal when it is irradiated with radiation of frequency 3.5 × 1014 s-1 is 6.626 × 10-20J.What is the threshold frequency of the metal ?
2.5 × 10-14 s-1
4.5 × 1014 s-1
2.5 × 1014s-1
2 × 10-14 s-1
The orbital diagram in which the aufbau principle is violated is
What is the Bohr radius associated with hydrogen atom ?
0.529 × 10-10 cm
5.29 × 10-10m
0.529 ×10-10m
None of these
What is the frequency ratio between two radiations of wave length 400nm and 700nm in the visible spectrum ?
14/8
4/7
8/14
15/8
The velocity of an electron in the third orbit of hydrogen atom is
7.27 × 107 cms-1
7.27 × 10-7 cms-1
3.64 × 107cms-1
The transition of electron from n = 3 to n = 1 will produce the shortest wave length in
Li2+
H
He+
H+
The quantum number +1/2 and -1/2 for the electron spin represent
Rotation of the electron in clockwise and anticlockwise direction respectively
Rotation of the electron in anticlockwise and clockwise direction respectively
Magnetic moment of the electron pointing up and down respectively.
Two quantum number mechanical spin states which have no classical analogue.
