What is the orbital angular momentum of an electron in 3s orbital?
Zero
h/2π
√2 h/2π
None of these
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
Infinity
The ground state of an atom means that all the electrons are?
Having the same energy
In the lowest possible energy state
In the first orbit
In the nucleus
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
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
The wave length of the first line of Balmer series of hydrogen atom is 6561Ao. The wave length of the third line of the series is
2180 Ao
4339 Ao
13122 Ao
5865 Ao
What is the maximum number of electrons in an atom that can have the quantum numbers n = 3, ml = +1 ?
8
4
16
6
How many number of spherical nodes will be in 4p orbitals ?
1
3
2
No two electrons in an atom can have the same set of four quantum number. This is the statement of
Pauli exclusion principle
Hund's rule
Avagadro's law
Isotones are nuclei having
Same atomic numbers
Same mass number
Same number of protons
Same number of neutrons
