Thomson's Model of an Atom & Limitations

Q. The mass of an electron is _________ times the mass of a proton.

1. 1840
2. $\frac{1}{1840}$
3. $\frac{1}{184}$
4. 184

Q.

Thomson's model of an atom could not explain the result of the scattering experiment performed by Rutherford.

1. Atoms are stable

2. Atoms are unstable

Q.

A chemical species that contains 11 protons and 10 electrons can be:

1. An atom

2. A monoatomic anion

3. A polyatomic cation

4. A monoatomic cation

Q. J. J. Thomson compared the structure of an atom with a watermelon and suggested that the seeds areand the red edible part is the.

1. positive sphere
2. neutrons
3. electrons
4. proton

Q.

Thomson's model of the atom could not explain the result of the scattering experiment performed by Rutherford.

1. Atoms are stable

2. Atoms are unstable

Q.

The first model of an atom was given by

1. N.Bohr

2. E.Goldstein

3. Rutherford

4. J.J Thomson

Q.

According to Thomson's model of the atom, which charges are distributed over which type of charges?

1. negative charges over positive charges

2. positive and negative charges over the nucleus

3. nucleus over positive and negative charges

4. positive charges over negative charges

Q.

Why did Thomson choose electric current only and also electrons were already discovered during the flow of electricity.why didn't Thomson choose any other rays or any thing to conduct the canal ray experiment.

Q. ntAn early model for an atom considered it to have a positively charged point nucleus of charge Ze, surrounded by a uniform density of negative charge opto a radius R. The atom as a whole is neutral. For this model, what is the electric field at a distance r from the nucleus?n ntn

Q.

Thomson compared atom to watermelon and thus derived some conclusions. Which of the following is his conclusion?

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 charge

Q.

When alpha particles were sent through a thin metal foil, only one out of ten thousand rebounded. This observation led to the conclusion that:

1. No positive charge is present.

2. More number of electrons are revolving around the nucleus of the atom

3. Unit positive charge is only present in an atom

4. Positively charged particles are concentrated at the centre of the atom

Q. Which of the following conclusions did the plum pudding model fail to explain?

1. orbits and motion of electrons

2. neutrality of atom

3. nuclear reactions

4. vacancy of an atom

Q.

Identify the names of the scientists who have proposed the model of an atom.

1. J.J. Thomson

2. Rutherford

3. John Dalton

4. Neil Bohr

Q.

The charge on an electron is _______ coulombs.

1. $-1.602\times {10}^{19}$
2. $+1.602\times {10}^{19}$
3. $+1.602\times {10}^{-19}$
4. $-1.602\times {10}^{-19}$

Q. J. J. Thomson Model could not able to explain the following?

1. stability of atom
2. electrical neutrality of atom
3. stability of nucleus
4. all of these

Q. Which of the following is a limitation of Thomson's model of an atom?

1. Arrangement of fundamental particles in an atom
2. Closeness of positive and negative charge
3. Both a and b
4. None of above

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

1. Thomson's model

2. Bohr's model

3. Rutherford's model

4. Chadwick's model

Q. Electrons were discovered by _______.

1. Sir Joseph John Thomson

2. Sir Edmund Hillary

3. Albert Einstein

4. William Tronisery

Q. J. J. Thomson compared the structure of an atom with a watermelon and suggested that the seeds areand the red edible part is the.

1. positive sphere
2. neutrons
3. electrons
4. proton

Q. An atom was earlier assumed to be a sphere of radius a having a positively charged point nucleus of charge +Ze at its centre.This nucleus was believed to be surrounded by a uniform density of negative charge that made the atom neutral as a whole.Use the theorem to find the electric field of this atom at a distance r(r<a) from the centre of the atom