In a given atom no two electrons can have the same values of all the four quantum numbers. This is called
Hund's rule
Aufbau principle
Uncertainty principle
Pauli's exclusion principle
In the photo electron emission, the energy of the emitted electron is
greater than the incident photon
same as that of the incident photon
smaller than the incident photon
proportional to the intensity of incident photon
The electron was shown experimentally to have wave properties by
de-Broglie
N Bohr
Davisson and Germer
Schrodinger
The spectrum of He is expected to be similar to that of
H
Na
Li+
He+
Number of unpaired electrons in N2+ is/are
2
0
1
3
The electronic configuration of gadolinium (At no 64) is
[Xe]4f8 ,5d9 ,6s2
[Xe] 4f7 ,5d1 ,6s2
[Xe] 4f6 ,5d2 ,6s2
[Xe] 4d3 ,5d5 ,6s2
The momentum of a particle having a de-Broglie wavelength of 10-7 m is
(Given h = 6.625×10-34 m)
3.3125×10-7 kg m s-1
26.5×10-7 kg m s-1
6.625×10-17 kg m s-1
13.25×10-7 kg m s-1
The energy of an electron in the nth Bohr orbit of hydrogen atom is
In hydrogen atom, energy of first excited state is -3.4 eV. Then, KE of same orbit of hydrogen atom is
+ 3.4 eV
+ 6.8 eV
- 13.6 eV
+ 13.6 eV
10 g of hydrogen and 64 g of oxygen were filled in a steel vessel and exploded. Amount of water produced in this reaction will be
2 moles
3 moles
4 moles
1 mole
