Thomson's Atomic Model

Q.

What are the characteristic features of Thomson's model of atom?

Q.

Plum Pudding model was proposed by whom?

1. J.J Thompson

2. James Chadwick

3. John Dalton

4. Goldstein

Q.

J.J. Thomson proposed that the nucleus of an atom contains only neutrons. True or False.

1. True

2. False

Q. Question 7
In the Thomson's model of an atom, which of the following statements are correct?
(i) The mass of the atom is assumed to be uniformly distributed over the atom.
(ii) The positive charge is assumed to be uniformly distributed over the atom.
(iii) The electrons are uniformly distributed in the positively charged sphere.
(iv) The electrons attract each other to stabilise the atom.

(a) (i), (ii) and (iii)
(b) (i) and (iii)
(c) (i) and (iv)
(d) (i), (iii) and (iv)

Q.

Thomson proposed the model of an atom to be similar to that of a:

1. Orange

2. See saw

3. Solar system

4. Christmas pudding

Q. Question 39
In what way is Rutherford's atomic model different from that of Thomson's atomic model?

Q. Which of the following statements is/are correct with respect to Thomson's model of an atom?
Statement I: The mass of the atom is assumed to be uniformly distributed over the atom.
Statement II: The positive charge is assumed to be uniformly distributed over the atom.
Statement III: The electrons are uniformly distributed in the positively charged sphere.
Stamtent IV: The electrons attract each other to stabilise the atom.

(a) I, II and III
(b) I and II
(c) I and IV
(d) I, III and IV

Q. _______ atomic model is also known as the plum pudding model.

1. Thomson's
2. Bohr's
3. Rutherford's
4. Dalton's

Q.

Which atomic model is also called plum pudding model?

Q.

Thomson's model of atom was proved wrong by which scientist on the basis of alpha ray scattering experiment?

1. Rutherford

2. Bohr

3. Dalton

4. Goldstein

Q.

Which of the following pictures represent the plum pudding model of an atom?

1. I

2. III

3. IV

4. II

Q.

Explain Thomson's model in brief. [2 MARKS]

Q. Which of the following statements is/are correct with respect to Thomson's model of an atom?
Statement I: The mass of the atom is assumed to be uniformly distributed over the atom.
Statement II: The positive charge is assumed to be uniformly distributed over the atom.
Statement III: The electrons are uniformly distributed in the positively charged sphere.
Stamtent IV: The electrons attract each other to stabilise the atom.

(a) I, II and III
(b) I and II
(c) I and IV
(d) I, III and IV

Q. J.J. Thomson discovered the electron.

1. False
2. True

Q. Question 38
Enlist the conclusions drawn by Rutherford from his a-ray scattering experiment.

Q.

Which of the following is not a part of J. J. Thomson’s atomic model?

1. Atom is a gel of positive charge.

2. Atoms have embedded negatively charged electrons.

3. Atom is a hollow sphere.

4. Electrons help in conduction of electricity.

Q.

Which of the following is not a part of J. J. Thomson’s atomic model?

1. Electrons help in conduction of electricity

2. Atoms have embedded negatively charged electrons

3. Atom is a hollow sphere

4. Atom is a gel of positive charge

Q.

Assertion (A): From Thomsons experiment and Millikans oil drop experiment, mass as well as charge of an electron can be calculated.

Reason (R): Specific charge of an electron is obtained from Thomsons experiment, whereas the charge of an electron is obtained from Millikans oil drop experiment.

1. Both A and R are true and R is the correct explanation of A.

2. Both A and R are true, but R is not the correct explanation of A.

3. A is true and R is false.

4. A is false and R is true.

Q.

The ratio of e/m for cathode rays

1. Varies with gas in discharge tube

2. Is maximum when hydrogen is taken

3. Varies with different electrode

4. Is fixed

Q. Question 43
In the gold foil experiment of Geiger and Marsden, that paved the way for Rutherford's model of an atom, $1.00\%$ of the alpha-particles were found to deflect at angles $>{50}^{\circ }$. If one mole of alpha-particles were bombarded on the gold foil, compute the number of alpha-particles that would deflect at angles less than ${50}^{\circ }$.

Q. _______ atomic model is also known as the plum pudding model.

1. Thomson's
2. Rutherford's
3. Bohr's
4. Dalton's

Q. According to J.J Thomson's atomic model, an atom consists of a charged sphere and are embedded in it.

1. positively
2. negatively
3. electrons
4. protons

Q. _______ atomic model is also known as the plum pudding model.

1. Thomson's
2. Rutherford's
3. Bohr's
4. Dalton's

Q. _______ atomic model is also known as the plum pudding model.

1. Thomson's
2. Bohr's
3. Rutherford's
4. Dalton's

Q. _______ atomic model is also known as the plum pudding model.

1. Rutherford's
2. Thomson's
3. Bohr's
4. Dalton's

Q.

What were the proposals given by Thompson's atomic model?

Q.

Thomson compared atom to watermelon (or plum pudding) and thus derived some conclusions.Which of the following are his conclusions?

1. The seeds are positive spheres and red edible parts are the electrons

2. The seeds are the electrons and red edible part is the positive sphere

3. The seeds and edible part both are electrons

4. The seeds and edible part both are positive charges.

Q. In Rutherford's experiment, a thin gold foil was bombarded with alpha particles. According to Thomson's "plum-pudding" model of the atom, what should have happened?

1. All the alpha particles would have been deflected by the foil
2. Alpha particles should have become embedded in the foil
3. Alpha particles should have passed through the foil with little or no deflection
4. All the alpha particles should have reflected straight back from the foil

Q. What are the postulates of the J J Thomson model?

Q.

Who discovered electron?