What is the maximum number of electrons in an atom that can have the quantum numbers n = 3, ml = +1 ?
8
4
16
6
The uncertainty in the position of a particle when the uncertainty in momentum is zero will be
6.626 × 10-34
4.14 × 10-35
Zero
Infinity
Which one of the following does Bohr theory fails to explain ?
Stability of hydrogen
Line spectra of hydrogen atom
Line spectra of Li2+
Splitting of spectral lines in the presence of magnetic field
In hydrogen atom if energy of an electron in ground state is 13.6 ev, then that in the first excited state is __________________.
6.8 ev
1.51 ev
3.4 ev
13.6 ev
Which theory observed that the ground state of nitrogen atom has 3 unpaired electrons in its electronic configuration ?
Heisenberg's uncertainty principle
Pauli's exclusion principle
Aufbau principle
Hund's rule of maximum multiplicity
What will be the total spin resulting from a d6 configuration?
3
3/2
1
2
What is the orbital angular momentum of an electron in 3s orbital?
h/2π
√2 h/2π
None of these
How many electrons will be present in the highest principal energy level of cobalt (z = 27) ?
7
9
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
In an atom with 2K, 8L and 13M electrons,what will be the total number of 'p' electrons ?
12
