The decrease in the attractive force exerted by the nucleus on the valence shell electrons is called:
shielding effect
stark effect
zeeman effect
none of these
According to Bohr's model of hydrogen atom:
the linear velocity of the electron is quantised
the angular velocity is quantised
the linear momentum of the electron is quantised
the angular momentum of the electron is quantised
The principal quantum number of an atom is related to the ______________.
size of the orbital
spin angular momentum
orbital angular momentum
orientation of the orbital in space
α -particle scattering experiment was proposed by _________.
Rutherford
Zeeman
Max Planck
Einsteen
The shape of s - orbital is ___________.
dumb bell
spherical
octahedral
tetrahedral
α - particles scattering experiment was proposed by ____________.
Neils Bohr
MaxPlanck
Einstein
The splitting of atomic spectral lines in the presence of an external magnetic field is
Twitter ion
Quantum effect
Photoelectric effect
The Zeeman effect
The existence of protons in the atoms was shown by
Chadwick
Madam Curie
Goldstein
Bohr's model violates the rules of classical physics because it assumes that:
all electrons have same charge
the nuclei have same charge
electrons can revolve around the nucleus
charged particles can be accelerate without emitting radiation.
Total number of orbitals present in the 'O' stationary state?
1
4
16
25
