____________ states that no two electrons will have all the four quantum numbers same.
Pauli's exclusion principle
Quantum theory
Hund's rule
Lewis theory
According to Rutherford's atomic model, if the electrons lose energy continuously, the observed atomic spectra should be___________ consisting of merging one into other.
continuous, sharp lines
discontinuous, sharp lines
continuous,broad bands
discontinuous, broad bands
The atomic numbers of three elements A, B and C are 5,9 and 13 respectively. Which two elements show similar chemical properties?
A and B
A and C
B and C
none of these
Size of the electron is __________.
10-13cm
10-8cm
10-6cm
10-10cm
Angular momentum, mvr = ______________.
nh / 3π
nh / 2π
nh / 8π
nh / 6π
Bohr atomic model can explain the spectrum of _________.
the hydrogen atom only
the hydrogen and hydrogenic species
the hydrogen molecule
only atoms of all elements
As the atomic size increases, the ionization energy ______________.
decreases
increases
will not change
none of the above
The ratio of the masses of proton and neutron is :
>1
<1
=1
>√1
__________ is defined as the minimum energy required to remove an electron from the outermost orbital of an atom in gaseous state.
Electron affinity
Electron negativity
Electrostatic energy
Ionization energy
The principal quantum number denotes the _________ of an electron.
energy sublevel
energy level
magnetic field
orbital
