The Structure of an Atom

Identify the sets of quantum numbers which are not possible?

$$\begin{gathered} \mathrm{a}. \mathrm{n}=0, \mathrm{l}=0, {\mathrm{m}}_1= 0, {\mathrm{m}}_{\mathrm{s}}= +\frac{1}{2} \\ \mathrm{b}. \mathrm{n}=1, \mathrm{l}=0, {\mathrm{m}}_1= 0, {\mathrm{m}}_{\mathrm{s}}= -\frac{1}{2} \\ \mathrm{c}. \mathrm{n}=1, \mathrm{l}=1, {\mathrm{m}}_1= 0, {\mathrm{m}}_{\mathrm{s}}= +\frac{1}{2} \\ \mathrm{d}. \mathrm{n}=2, \mathrm{l}=1, {\mathrm{m}}_1=0, {\mathrm{m}}_{\mathrm{s}}=-\frac{1}{2} \end{gathered}$$

The number of neutrons in  ${}_{13}{}^{27}\mathrm{Al}$ is

 Electron Is invented by

Match the following :
List -I :
(a) Frequency of distribution of the emitted radiation from a black body
(b) Spin quantum numbers(m_s)
(c) Angular Momentum
(d) All orbital have equal energy

List - II :
(i) degeneracy
(ii) temperature dependent
(iii) vector quantity
(iv) mass times velocity times radius 

Codes:

By whom was neutron discovered?

The nucleus of an atom contains 

(i) Atoms are neutral electrically.

(ii) Atomic diameter is approximately ${10}^{-8}$ cm.

(iii) Atom is a positively charged sphere and electrons are distributed within it.

Which of the above views in Joseph Thomson's model of the atom are no longer valid today?

Atomic models have been improved over the years. Arrange the following atomic models in their chronological order.

(i) Rutherford's atomic model.

(ii) Thomson's atomic model

(iii) Bohr's atomic model

Which of the following in the given figure does not represent Bohr's model of an atom correctly?

In Thomson's model of an atom, which of the following statement are correct?

(1) The mass of the atom is assumed to be uniformly distributed over the atom.

(2) The positive charge is assumed to be uniformly distributed over the atom.

(3) The electrons are uniformly distributed in the positively charged sphere.

(4) The electrons attract each other to stabilize the atom.

Rutherford's $\alpha$ - particle scattering experiment showed that-

$\left(i\right)$ Electrons have negative charge

$\left(ii\right)$ The mass and positive charge of atom is concentrated in the nucleus

$\left(iii\right)$ Neutron exists in the nucleus

$\left(iv\right)$ Most of the space of atom is empty

Which of the above statements are correct?

Consider the following statements.

(i) Electrons in an atom move in circular orbits at a specified distance from the nucleus.

(ii) Electrons in an atom want to be at the lowest energy level

(iii) The existence of electrons around the nucleus is explained by the electron cloud model.

(iv) The energy of the orbit and electron increases as we go farther away from the nucleus

(v) Each orbit has a certain energy and the electron takes the energy of the orbit it is located in.

How many of the above belong to the Bohr's model of the atom?

For his scattering experiment, Rutherford used which of the following rays?

The first model of an atom was given by

Which of the following statements about Bohr's atomic model is considered incorrect today?

Which of the following is incorrect about Rutherford's atomic model based on the results of his experiment?

Which of the following statements about Rutherford's model of the atom is correct?

(i) Considered the nucleus as positively charged.

(ii) Established that the $\alpha$-particles are four times as heavy as a hydrogen atom

(iii) Can be compared to the solar system

(iv) Was in agreement with Thomson's model

Rutherford's alpha ($\alpha$) particles scattering experiment resulted in the discovery of the                                                     

The symbol of neutron is _____.

Which of the following statement is always correct?