If an electron is moving with a velocity 600 ms^-1 which is accurate upto 0.005%, then calculate the uncertainty in its position. (h = 6.63 x 10^-34 Js. mass of electron = 9.1 x 10^-31 kg)

Light of wavelength 12818 \(\overset { o }{ A } \) is emitted when the electron of a hydrogen atom drops from 5^th to 3^rd orbit. Find the wavelength of a photon emitted when the electron falls from 3^rd to 2^nd orbit.

Calculate the de-Broglie wavelength of an electron that has been accelerated from rest through a potential difference of 1 keV.

Calculate the uncertainty in the position of an electron, if the uncertainty in its velocity is 5.7 x 10⁵ ms^-1.

Calculate the total number of angular nodes and radial nodes present in 3d and 4f orbitals.

Explain about
(i) Magnetic quantum number
(ii) Spin quantum number

Explain the angular distribution function of 1s, 2s, 3s, 2p, 3d and 4f orbits.

What is exchange energy? How it is related with stability of atoms? Explain with suitable examples.

Describe about Bohr atom model.

Derive de-Broglie wave length.

What are the main features of quantum mechanical model of an atom.