Drawbacks of Rutherford's Model

Q. The momentum of a photon having energy equal to the rest energy of an electron is 1 zero _22 2 2.73 x 10 kg m/s 3 infinite _24 4 1.99 x 10 kg m/s

Q.

How are atoms formed?

Q.

What are the 6 models of the atom?

Q.
The diagram shows the paths of four $\alpha$- particles , having the same energy, being scattered by the nucleus of an atom simultaneously. Which of these is not possible physically ?

1. $3$ & $4$
2. $2$ & $3$
3. $1$ & $4$
4. $4\text{only}$

Q. Angular momentum of an electron is directly proportional to (T is time period) a)T b)sqrootT c) Tsquare d) cube rootT

Q. A classical atom based on is doomed to collapse.

1. Thomson’s model
2. Bohr's model
3. Rutherford’s model

Q. The particle which can be added to the nucleus of an atom without changing its chemical properties are

1. Protons
2. Electrons
3. Positrons
4. Neutrons

Q. According to Rutherford's atomic model, the electrons inside the atom are -

1. Stationary
2. Moving
3. Some time stationary, some time moving
4. None of these

Q. Choose the correct option from the following options given below:

Q. the momentum of a photon having energy equal to the rest energy of an electron i

Q.

Number of alpha particles N scattered at an angle θ during Rutherfords alpha scattering experiment is :

1. 

2. 

3. 

4. 

Q. Q.In Bohrs orbit, the relation between radius and angular momentum of an electron is?

Q.

Explain Nuclear Magnetic Resonance.

Q. In an experiment on photoelectric effect, a photon is incident on an electron from one direction and the photoelectron is emitted almost in the opposite direction. Does this violate the principle of conservation of momentum?

Q. photoelectrons are emitted from a sodium metal surface when it is irradiated with radiation.The wrong statement is :
1.all the photoelectrons will have the same KE
2.all the photoelectrons will have the same matter wavelength
3.all the electrons will have the same momentum
4.all the above

(please explain the reasons for the same)

Q. The angular momentum of an electron in a hydrogen atom is proportional to a rootr b 1/r C 1/rootr D r

Q. What will be the angular momentum of an electron, in a hydrogen atom, if its energy is $1.5\text{eV}$?

1. $1.05\times {10}^{-34}\text{J-s}$
2. $2.1\times {10}^{-34}\text{J-s}$
3. $3.16\times {10}^{-34}\text{J-s}$
4. $-2.1\times {10}^{-34}\text{J-s}$

Q. Drawback of Rutherford model of atoms was:

1. no explanation for the neutral nature of atoms
2. neutron was not known
3. could not explain the stability of atoms
4. to explanation of Isotopes
5. None of these

Q.

Differentiate between the following.

Discoveries of J.J. Thomson, Ernest Rutherford, and Neils Bohr.

Q. Can we find the mass of a photon by the definition p = mv?

Q. As the electron moves towards the nucleus, its angular momentum .

1. remains constant
2. increases
3. decreases

Q. A classical atom based on is doomed to collapse.

1. Thomson’s model
2. Bohr's model
3. Rutherford’s model

Q. When photon of higher energy strikes electron , it changes speed and direction i.e. momentum changes but position can be found. Here, speed is distance upon time then how position can be found?

Q. A nucleus of mass M initiallyat rest splits into 2 fragments of masses M^"/3 and 2M^/3 ( M< M^). Find the ratio of de brofliewavelengths of the two fragments.

Q. Suppose, the electron in a hydrogen atom makes transition from n = 3 to n = 2 in 10⁻⁸ s. The order of the torque acting on the electron in this period, using the relation between torque and angular momentum as discussed in the chapter on rotational mechanics is

(a) 10⁻³⁴ N m
(b) 10⁻²⁴ N m
(c) 10⁻⁴² N m
(d) 10⁻⁸ N m

Q. The angular momentum of an electron in a hydrogen atom is proportional to a rootr b 1/r C 1/rootr D r

Q. Rutherford could not explain:

1. stability of an atom
2. spectrum of hydrogen atom
3. Circular motion of electrons
4. The spiral path of electrons

Q. A nucleus of mass M initiallyat rest splits into 2 fragments of masses M^"/3 and2M^/3 ( M< M^). Find the ratio of debrofliewavelengths of the two fragments.

Q. Which of these were the drawbacks of Rutherford's model.

1. An atom will be highly unstable.
2. An atom won't be electrically neutral in Rutherford's model
3. Presence of subatomic particle was not predicted
4. Couldn't explain the discrete spectra given by atoms

Q.

A nucleus is at rest in the laboratory frame of reference. Show that if it disintegrates into two smaller nuclei the products must move in opposite directions.