List of top Physics Questions on atom structure models

A hydrogen-like atom of atomic number Z transits from n=4 to n=3. The photon emitted from this transition is incident on a metal surface of threshold wavelength λ_th = 310nm. If the maximum kinetic energy of the emitted electron is 1.95ev, find the value of Z.

An amplitude-modulated wave is represented by cm (t) = 10[1+0.6 sin(1250t)] sin(103 t). Then the modulation index is:

A hydrogen-like atom of atomic number Z transits from n=4 to n=3. The photon emitted from this transition is incident on a metal surface of threshold wavelength λ_th = 310nm. If the maximum kinetic energy of the emitted electron is 1.95ev, find the value of Z.

In a hypothetical Bohr hydrogen atom, if the mass of the electron is double then the energy of the electron in the first orbit is:

The number of protons or atomic number is reduced to 2 by which form of radioactive decay?

Electron belongs to the family of

An electron is revolving in its Bohr orbit having Bohr radius of 0.529 Å, then the radius of third orbit is

The ratio maximum wavelength to minimum wavelength in lyman series is :

Binding energy of Nitrogen Molecule ¹⁴₇N . Given m (¹⁴₇N) = 14.00307 a.m.u

In accordance with the bohr's model the quantum number that characterises the earth revolution around the sun in an orbit of radius 1.5 x 10¹¹ m with orbital speed 3 x 10⁴ m/s is [given mass of the earth = 6 x 10²⁴kg]

In an atom electrons revolve around the nucleus along a path of radius 0.72 A making 9.4 x 10¹⁴ revolutions per second. The equivalent current is. (Given e = 1.6 x 10^-19 C)

The radius of hydrogen atom in the ground state is 0.53 Å .After collision with an electron it is found to have a radius of 2.1 Å, the principal quantum number 'n' of the state of the atom is

$20\, kV$ potential is applied across $X$-ray tube, the minimum wavelength of $X$-ray emitted will be

The wavelength of the energy emitted when electron come from fourth orbit to second orbit in hydrogen is $ 20,397\text{ }c{{m}^{-1}} $ . The wavelength of energy for the same transition in He+ is :

If z is the atomic number then radius of g first Bohr orbit is proportional to :

A thermodynamic system is taken through the cycle

A B C D

as shown in the figure. Heat rejected by the gas during the cycle is:

Radius of the first orbit in H-atom is a0. Then, deBroglie wavelength of electron in the third orbit is

List of top Physics Questions on atom structure models

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