Rutherford's Alpha Scattering Experiment

Q. The radius of an atomic nucleus is of the order of:

1. ${10}^{-10}\text{cm}$
2. ${10}^{-13}\text{cm}$
3. ${10}^{-15}\text{cm}$
4. ${10}^{-8}\text{cm}$

Q.

What are the conclusions of the Gold foil Experiment?

Q.

Rutherford’s alpha-particle scattering experiment was responsible for the discovery of :

1. Atomic nucleus

2. Electron

3. proton

4. Neutron

Q. When alpha particles are bombarded on thin gold foil, most of them go straight through the foil because:

1. Alpha particles are much lighter than electrons
2. Alpha particles are positively charged
3. Most of the atom is empty space
4. Alpha particles moves with high velocity

Q. Rutherford’s model of atom resembles the solar system in which the nucleus plays the role of sun and the electrons that of revolving planets but it could not explain the stability of atom because

1. Gravitational force is weeker than electrostatic force
2. Gravitational force is stronger than electrostatic force
3. The palnets revolving around the sun carries net charge
4. Electrons revolving around nucleus carries net charge

Q.

What are the results of alpha-particle scattering experiment ?

Q. In the Rutherford scattering experiment, most of the alpha particles were able to pass through a thin gold foil. This leads to the conclusion that:

1. An atom consists of a heavy, postively charged particle called nucleus
2. It supported Thomson's plum pudding model
3. Most of the space in the atom is empty
4. All of the above

Q. Which of the following statements about Rutherford's model of an atom is not correct?

1. Most of the atom's mass is concentrated in an extremely small region called nucleus
2. Electrons move around the nucleus in orbits
3. Electrons and nucleus are held together by electrostatic forces of attraction
4. The model explained the stability of an atom

Q. Rutherford's experiment, which established the nuclear model of the atom, used a beam of

1. $\beta -$ particles, which impinged on a metal foil and got absorbed
2. $\gamma -$ rays, which impinged on a metal foil and got scattered
3. Helium atoms, which impinged on a metal foil and got scattered
4. Helium nuclei, which impiniged on a metal foil and got scattered

Q. Which of the following observations of α-particle scattering experiment led to the presence of a small positively charged nucleus in the centre?

1. Most of the α–particles passed through the gold foil undeflected
2. Only a few α-particles deflected away from their path after passing through the gold foil
3. Very few α-particles rebounded
4. None of the above

Q. Statement - 1: Rutherford’s model of the atom was able to explain the electrical neutrality of the atom.

Statement - 2: Rutherford’s model of the atom was able to explain the stability of the atom.

1. TT
2. FF
3. TF
4. FT

Q.

Explain: Most of the space in an atom is empty.

Q. Why was a gold foil used in alpha particle scattering experiment?

1. Gold is the most malleable metal
2. Gold is a good conductor of electricity
3. Gold is a very ductile metal
4. None of the above

Q. Which of the following statements is/ are the drawback(s) of the Rutherford's model?

1. It could not explain the stability of atoms
2. It does not explain the distribution of electrons around nuclei
3. It was unable to explain the line spectrum of hydrogen atoms
4. All of the above statements are correct
   

Q. Which of the following observations from the alpha particle scattering experiment concluded that most of the atom is empty space?

1. Most of the alpha particles passed through the gold foil undeflected
2. A small fraction of the alpha particles is deflected by a small angle
3. A very few alpha particles bounced back
4. None of the above

Q. Rutherford's experiment on scattering of alpha particles showed for the first time that the atom has

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

Q.

Which of the following statements about Rutherford’s model of the atom are correct?

(i) considered the nucleus as positively charged

(ii) established that the $\mathrm{\alpha }$–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

1. (i) and (iii)

2. (ii) and (iii)

3. (i) and (iv)

4. only (i)

Q.

When alpha particles are sent through a thin metal foil, most of them go straight through the foil because :

1. alpha particles are much heavier than electrons

2. alpha particles are positively charged

3. most part of the atom is empty space

4. alpha particles move with high velocity

Q. Rutherford’s alpha particle scattering is related to the size of the:

1. Nucleus
2. Atom
3. Electron
4. Neutron

Q. A 24.6 MeV alpha particle moves towards gold nucleus (atomic number 79). Calculate the distance of closest approach of alpha particle.

Q.

What experiment established the presence of atomic nucleus ? What features of the nucleus were deduced from this experiment ?

Q.

What observations in the scattering experiment led Rutherford to make the following conclusions:

Most of the space in an atom is empty.

Q. Which of the following is the drawback of Rutherford's Model?

1. He could not explain the deflection of alpha particles from gold foil
2. He could not explain the overall neutrality of an atom
3. He could not explain the stability of an atom
4. All of the above

Q. Assertion (A): An aluminium foil cannot be used in the α- particle scattering experiment.
Reason (R): Aluminium is a malleable metal.

1. Both the assertion and the reason are correct and the reason is the correct explanation of the assertion.
2. Both the assertion and the reason are correct but, the reason is not the correct explanation of the assertion.
3. The assertion is correct and the reason is incorrect.
4. The assertion is incorrect and the reason is correct.

Q. Which one is more electropositive and why?
D2O (heavy water) or H2O

Q.

In Rutherford’s experiment, generally the thin foil of heavy atoms, like gold, platinum etc. have been used to be bombarded by the α-particles. If the thin foil of light atoms like Aluminium etc. is used, what difference would be observed from the above results?

Q. Rutherford’s experiment lead to the discovery of which of the following?

1. Electron
2. Neutron
3. Proton
4. Nucleus

Q.

Question 01

Which of the following conclusions could not be derived from Rutherford's $\alpha$-particles scattering experiment ?

(a) Most of the space in the atom is empty

(b) The radius of the atom is about ${10}^{-10}m$ while that of nucleus is ${10}^{-15}m$

(c) Electrons move in a circular path of fixed energy called orbits

(d) Electrons and the nucleus are held together by electrostatic forces of attraction

Q.

Why Rutherford model is called nuclear model?

Q. When $\alpha$-particles are passed through a thin metal foil, most of them go straight through the foil because:

1. $\alpha$-particles are much heavier than electrons
2. $\alpha$-particles are positively charged
3. most of the atom is empty
4. $\alpha$-particles move with a high velocity