Atomic Model

In an atom ${}_{\text{13}}{\text{AI}}^{\text{27}}$, find the number of neutrons.

In an atom ${}_{\text{13}}{\text{AI}}^{\text{27}}$, find the number of protons.

In an atom ${}_{\text{13}}{\text{AI}}^{\text{27}}$, find the number of electrons.

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 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,

The total energy of an electron in the hydrogen atom is $-2.2\times {10}^{-18} \mathrm{J}$.  The kinetic energy of the electron will be:

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

A standing wave in a string 35 cm long has a total of six nodes including those at the ends. Hence, wavelength of the standing wave is

Rutherford $\alpha$-scattering demonstrates the existence of which of the following ?

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

$\alpha$-particles of $\text{6 MeV}$ energy are scattered back from a silver foil. If the maximum volume in which the entire positive charge of the atom is supposed to be concentrated is $4.8\times {10}^{-\mathrm{n}} {\mathrm{m}}^3$ then find value of n. $\left[\left(\text{Z for Ag}=\text{47}\right)\text{,}\mathrm{ k}=\text{9.0}\times {\text{10}}^9{\text{ Nm}}^2{\text{ C}}^{-2}\right]$.

According to $\mathrm{\alpha }-$particle scattering experiment of Rutherford.
$\mathrm{N}\left(\mathrm{\theta }\right) \propto$ $\frac{1}{\mathrm{K}.{\mathrm{E}}^{\mathrm{x}}}$
Here $\mathrm{N}\left(\mathrm{\theta }\right) =$ no. of α-particle scattered at an angle $\mathrm{\theta }.$
$\mathrm{K}.\mathrm{E} =$Kinetic energy (initial) of $\mathrm{\alpha }-$particle.
What is the value of $\mathrm{x} ?$

Three particles having charges in the ratio of $2 :3:5$ produce the same point on the photographic film in Thomson experiment. Their masses are in the ratio of

When a hydrogen atom is raised from ground energy level to excited energy level, then

Which of the following is incorrect regarding Rutherford's atomic model?

Which of the following properties of atom could be explained correctly by the Thomson Model of atom?

Which of the following is incorrect regarding Rutherford's atomic model?