Atomic Models

Rutherford’s Nuclear Model of Atom model is that the mass of the atom is assumed to be uniformly distributed over the atom.

The nucleus is surrounded by electrons that move around the nucleus with a very high speed in circular paths called _____.

The concept of atom based on experimental observation first came from:

"All matter is made up of very small particles which cannot be further broken down. These particles are called atoms". This statement is one of the assumptions of :

According to Dalton, atoms of different elements combine with one another to form:

Which of the following laws are in accordance with Dalton's atomic theory?

${}_5{}^{11}\mathrm{B}$ and ${}_6{}^{12}\mathrm{C}$ form a pair of 

Identify an isobar of ${}_6{}^{14}\mathrm{C}$ from the following elements.

What led to the failure of Dalton's atomic theory?

Dalton's atomic theory was not able to explain which of the following:

Write the main points of the atomic theory given by Dalton.

Which of the following is an assumption of the Schrödinger model of the hydrogen atom?

Which of the following statements represent an incorrect limitation of Thomson's Atomic model?

Thomson's atomic model fails to explain the results of scattering experiments, carried out by _____.

If the ratio of radius of two different nuclei are in the ratio of $2:3$, then ratio of their mass numbers will be

Which of the following feature of an atom is not a direct result of Rutherford's experiment?

What will be the mass of electron if it travels with a velocity equal to that of light?

An atom has $26$ electrons and its atomic weight is $56$. The number of neutrons in the atom are:

The nucleus of an atom is spherical. The relation between radius of the nucleus and mass number $\mathrm{A}$ is given by $1{.25\times 10}^{-\mathrm{13}}\times {\mathrm{A}}^{\frac{1}{3}}\mathrm{ }\mathrm{cm}$ . If radius of atom is one $\mathrm{\AA }$ and the mass number is $64$, then the fraction of the atomic volume that is occupied by the nucleus is $\left(\mathrm{x}\right)\times 10^{-13}$ . Calculate $20\mathrm{x}$(nearest integer).

An $\mathrm{\alpha }$ -paticle approaches the target nucleus of copper (Z = 29) in such a way that the value of impact parameter is zero. The distance of closest approach will be