Rutherford's Gold Foil Experiments

Q.

Why Rutherford used only gold foil and not any other metal foil?

Q.

Name the scientist who showed the existence of protons in an atom.

Q.

Rutherford directed high speed positively charged alpha particles towards a thin ______ foil.

1. aluminium
2. silver
3. gold
4. lithium

Q.

Explain the reasons why Rutherford preferred to use a gold foil for his experiment instead of other metals.

Q. Why according to Rutherford positively charged particles are concentrated at the centre of the atom when alpha particles were sent through a thin metal foil.

Q. Rutherford identified that rays have a higher penetrating power compared to alpha rays.

1. beta
2. meta
3. theta

Q. Rutherford proposed that in a neutral atom, the number of protons inside the nucleus is ________ the number of electrons revolving outside the nucleus.

1. not equal to
2. equals to
3. greater than
4. lesser than

Q. In the gold foil experiment, a few alpha particles were deflected by small angles.

1. True
2. False

Q.

Which among the following is a feature of nuclear model of an atom as proposed by Rutherford?

1. Presence of nucleus and movement of electrons in circular path

2. Size of the atom is equal to size of nucleus

3. Mass of the atom is uniformly distributed throughout the atom

4. Electrons travel in a random path.

Q. A beam of alpha-particles is bombarded at a piece of gold foil as shown in the figure below.

After striking the gold foil, in which direction do most of the alpha-particles travel?

1. P
2. Q
3. R
4. S

Q.

What are alpha particles?

1. Alpha particles are doubly charged hydrogen ions

2. Alpha particles are doubly charged helium ions

3. Alpha particles are single charged helium ions

4. Alpha particles have no positive ion

Q.

Which metal foil was used by Rutherford in the alpha ray scattering experiment?

1. Silver

2. Gold

3. Magnesium

4. Sodium

Q.

Rutherford selected gold for alpha particle scattering experiment because
(i) Gold was cheaper and brittle.
(ii) Gold can be easily hammered into a thin layer of 1000 atoms without breaking it.
(iii) Gold does not chemically react with alpha particle.

1. Only (i)

2. Both (ii) and (iii)

3. Both (i) and (ii)

4. Only (ii)

Q.

In the Rutherford's atomic model, which of the following particles were used?

1. Gamma particles

2. Alpha particles

3. Zeta particles

4. Beta particles