Atomic Model

In Rutherford's experiment, a thin gold foil was bombarded by alpha particles. If Thomson's "Plum Pudding Model" of the atom were correct, what would have been the outcome of the experiment?

An $\alpha$ particle with energy $7.7 \mathrm{MeV}$ approaches a stationary nucleus of $\mathrm{Au}(Z=79)$. Assuming both of them to be point particles, the closest it will be able to come to the $\mathrm{Au}$ nucleus is

In a Davisson-Germer experiment, Helium atoms were used in place of electrons. What should be the energy of Helium so that a strong peak of scattered He appears at an angle of $50°,$ as was the case with electrons having an energy of $54 \mathrm{eV}?$ (Take mass of $\mathrm{He}$ atoms to be $7500$ times the mass of electrons)

Who gave the first model of an atom?

In Rutherford scattering experiment, the correct angle of scattering of α− particles for impact parameter equal to zero is

In Rutherford's experiment, the alpha particles that come closer to the nuclei are

Out of the following statements regarding Rutherford's model, which of the following is/are correct?

a. Most of the space inside an atom is empty.

b. The electrons revolve around the nucleus under the influence of coulomb force acting on them.

c. Most part of the mass of the atom and its positive charge are concentrated at its centre.

d. The stability of atom was established by the model.

Velocity of electron orbiting around nucleus of hydrogen atom is proportional to radius (r)

Radius of the smallest orbit of hydrogen atom is

$(h =Planks\text{'} cons\tan t = 6.6\times {10}^{-34}Js, Me=9.1\times {10}^{-31}g \mathrm{and} e=1.6\times {10}^{-19}C)$

The gravitational force between a $\mathrm{H}$-atom and another particle of mass $m$ will be given by Newton's law $F=G\frac{M\cdot m}{r^2}$, where $r$ is in metre and

Geiger-Marsden experiment is related with the size of the-

A proton of mass $m$ and charge $e$ is projected from a very large distance towards an $\alpha$ -particle with velocity $v .$ Initially $\alpha$ -particle is at rest, but it is free to move. If gravity is neglected, then the minimum separation along the straight line of their motion will be
 

A beam of fast moving alpha particles were directed towards a thin film of Gold. The parts $A^{\text{'}}, B^{\text{'}}$ and $C^{\text{'}}$ of the transmitted and reflected beams corresponding to the incident parts $A, B$ and $C$ of the beam are shown in the adjoing diagram. The number of alpha particles in

$\alpha$ - particle consists of

In Rutherford's experiment, an $\text{α}$-particle of mass $m$ and charge $q$ moves at high speed $u$, along the $x$-axis. It is initially near $x=-\infty$, and it ends up near $x=+\infty .$ The gold nucleus having charge $Q$ is fixed at the point $x=0, y=-d$. As the $\text{α}$-particle passes the stationary nucleus, its $x$-component of velocity does not change appreciably, but it acquires a small velocity in the $y$-direction. The angle through which the $\text{α}$-particle is deflected is,

On which of the following factors does the trajectory of an alpha particle depend?

The significant result deduced from the Rutherford's scattering experiment is that

What is the conclusion of Rutherford’s alpha particle scattering experiment ?

An atom is electrically neutral because there are 

_____ is the smallest unit of matter.