Atoms Physics - Atoms

The value of scattering angle of alpha particle for maximum value of impact parameter is :

The value of excitation energy required to bring an electron to the first excited state in hydrogen atom is :

According to Bohr's Model, which is not possible energy value of emitted photon by hydrogen atom :

Write any two drawbacks of Rutherford's experiment related to atomic structure.

What is the reason that the numbers of absorption transitions is less than the emission transition in atom?

In Rutherford's scattering model, it is shown that : (i) mostly alpha particle passes direct linearly without scattering, (ii) while some scattered by making large angle and some of these after scattering returned back to their path. What is the information obtained from these about atomic structure?

Why, some definite lines of atomic spectrum of matter is obtained?

Define the ionisation energy. What is the value of it for hydrogen atom?

The radius of the innermost electron orbit of a hydrogen atom is 5.3 ×10^-11 m. What are the radii of the n = 2 and n = 3 orbits? 

A different of 2.3 eV separates two energy levels in an atom. What is the frequency of radiation emitted when the atom make a transition from the upper level to the lower level?

Suppose you are given a chance to repeat the alpha-particle scattering experiment using a thin sheet of solid hydorgen in place of the gold foil. (Hydrogen is a solid at temperatures below 14 K.) What results do you expect?

The photons of continuous frequency range are passing through rarafied hydrogen pattern. Three absorbed lines are shown in Fig.

(i) To which series of hydrogen spectrum, these lines are related?
(ii) Out of them which has maximum wavelength?

Explain the assumption related to quantization of angular momentum in Bohr's theory.###Explain quantum condition for orbital motion of electron in hydrogen atom.###Explain Bohr's second postulate of quantisation by de Broglie hypothesis.

A hydrogen atom initially in the ground level absorbs a photon, which excites it to the n = 4 level. Determine the wavelength and frequency of photon.

The ground state energy of hydrogen atom is is - 13.6 eV. What are the kinetic and potential energies of the electron in this state?

Calculate the orbital period in each of these levels.

Explain the shortcomings of Rutherford's Atomic Model.###Write two shortcomings of Rutherford's Atomic Model.

A 12.5 eV electron beam is used to bombard gaseous hydrogen at room temperature. What series of wavelengths will be emitted?

Using the Bohr's model, calculate the speed of the electron in a hydrogen atom in the n = 1 2, and 3 levels.

Write first and second postulates of Bohr's Atomic Model. Obtain the expression for radius and velocity of stable orbit of electron.###Explain Bohr's two postulates for hydrogen atom.

The positively charged part of the atom possesses most of the mass in _________ (Rutherford's model/both the models.)

An atom has a nearly continuous mass distribution in a __________ but has a highly non-uniform mass distribution in __________ (Thomson's model/Rutherford's model.)

A classical atom based on __________ is doomed to collapse. (Thomson's model/Rutherford's model.)

In the ground state of __________ electrons are in stable equilibrium, while in __________ electrons always experience a net force. (Thomson's model/Rutherford's model.)

The size of the atom in Thomson's model the __________ the atomic size in Rutherford's model. (much greater than/no different from/much less than.)