List of top Physics Questions on Atomic Models

The electron of hydrogen atom is considered to be revolving round a proton in circular orbit of radius \(h^2/me^2\) with velocity \(e^2/h\), where \(h = h/2\pi\). The current \(i\) is
A parallel beam of fast moving electrons is incident normally on a narrow slit. A screen is placed at a large distance from the slit. If the speed of the electrons is increased, which of the following statement is correct?
The \(K_{\alpha}\) and \(K_{\beta}\) X-rays are emitted when there is a transition of electron between the levels
Which phenomenon best supports the theory that matter has a wave nature?
Two electrons moving in opposite direction with speeds 0.8c and 0.4c where \( c \) is the speed of light in vacuum. Then the relative speed is about
Indicate which one of the following statements is NOT CORRECT?
Identify the graph which correctly represents Moseley's law.
Assuming \( f \) to be the frequency of the first line in Balmer series, the frequency of the immediate next (i.e., second) line is
The velocity of a particle at which the kinetic energy is equal to its rest energy is
One electron and one proton are accelerated by equal potential. Ratio in their deBroglie wavelength is
The magnetic moment of the ground state of an atom whose open sub-shell is half-filled with five electrons is
In the angular momentum equation for the hydrogen atom, the principal quantum number is:
The transition of an electron from \( n = 5 \) to \( n = 6 \) corresponds to:
The wavelength of a spectral line in the second order of the hydrogen spectrum is 2.82 Å. The wavelength of the spectral line in the first order is:
Which is the incorrect statement of the following?