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 wave length of a spectral line for an electronic transition is inversely related to
The nuclear charge of the atom
The difference in the energy of the energy levels involved in the transition
The number of electrons undergoing the transition
The velocity of the electron undergoing the transition
No two electrons in an atom can have the same set of four quantum number. This is the statement of
Pauli's exclusion principle
Hund's rule
Aufbau principle
None of these
The number of nodal planes in 2pz orbital is
Zero
One
Two
Infinity
What is the time taken for an electron to complete an revolution in the Bohr orbit of hydrogen atom ?
4π2mr2/nh
h/2πmr
nh.4π2mr
2πmr/n2h2
The first energy shell that can have f - orbitals is
Second
First
Fourth
Third
The correct set of quantum numbers for the unpaired electron of chlorine atom is
n = 3, l = 1, ml = 1
n = 2, l = 1, ml = 0
The orbital diagram in which the aufbau principle is violated is
Name the atom which does not contain neutron ?
Carbon
Hydrogen
Neon
Helium
Who proposed the uncertainty principle ?
De Broglie
Davisson
Max Planck
Heisenberg