Alpha, Beta and Gamma Particles

Q.

The charge of alpha particles is:

1. -2

2. -1

3. +4

4. +2

Q. α-particles are doubly-charged helium ions.

1. True
2. False

Q. Rutherford’s $\alpha$ - particle scattering experiment showed that

A. Electrons have negative charge

B. The mass and positive charge of the atom is concentrated in the nucleus

C. Neutron exists in the nucleus

D. Most of the space in atom is empty
Which of the above statements are correct?

1. A and C
2. B and D
3. A and D
4. C and D

Q.

why sodium is a cation?

Q.

What do you think would be the observation if the alpha-particle scattering experiment is car­ried out using a foil of a metal other than gold?

Q. Which of the following statement is true regarding gamma rays?

1. Gamma rays are positively charged
2. Gamma rays do not have any electrical charge.
3. Gamma rays are negatively charged
4. The charge associated with gamma rays vary

Q. If all non metals have negative charge , why only hydrogen has a positive charge?

Q.

The alpha particles carry______units of positive charge.

1. 2

2. 3

3. 0

4. 1

Q. Choose the correct statements regarding the characteristics of alpha particles.

1. Alpha particles are negatively charged species
2. Alpha particles are positively charged species
3. Alpha particle = Helium nucleus
4. Alpha particles are electrically neutral

Q.

What determines the number of positive charges on the nucleus?

Q. How do ions get plus or minus charges ?

Q.

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

1. Unit positive charge is only present in an atom

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

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

4. No positive charge is present.

Q.

__________ are the nuclei of helium atoms.

1. Zeta particles

2. Gamma particles

3. Alpha particles

4. Beta particles

Q. Why did Ratherford choose a gold foil and Alfa particles for his experiment

Q.

Gamma rays do not have any electrical charge.

1. True

2. False

Q. Which of the following statement is true regarding gamma rays?

1. They are positively charged.
2. They are electrically neutral.
3. They are negatively charged.
4. The charge associated with gamma rays vary.

Q.

__________ are the nuclei of helium atoms.

1. Zeta particles

2. Gamma particles

3. Alpha particles

4. Beta particles

Q.

___ consists of two protons and two neutrons.

1. alpha particle

2. Gamma rays

3. X- rays

4. Beta rays

Q. An α-particle has all the given properties, except

1. it has +2 charge
2. it has mass of 4 u
3. it has no electron
4. it is double positively charged magnesium cation

Q.

Which of the following sub atomic particle has mass one unit and charge plus one?

1. Electron

2. Both B & C

3. Neutron

4. Proton

Q.

Assertion(A): The specific charge of $\alpha$ particle is less than ${\mathrm{H}}^{+}$.

Reason(R): Hydrogen has only one proton.

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. Assertion: Aluminium foil cannot be used in the $\alpha$ - particle scattering experiment.
Reason: Aluminium is a highly malleable metal.

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

Q.

The alpha particle carry______units of positive charge.

1. 1

2. 3

3. 2

4. 0

Q.

Assertion: Aluminium foil can be used in $\alpha$ - particle scattering experiment
Reason: Aluminium is a highly malleable metal.

1. Both Assertion and Reason are correct and Reason is the correct explanation of Assertion

2. Both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion

3. Assertion is correct but Reason is incorrect

4. Assertion is incorrect but Reason is correct

Q. What are alpha particles?

Q.

__________ are the nuclei of helium atoms.

1. Zeta particles

2. Gamma particles

3. Alpha particles

4. Beta particles

Q.

What is an $\alpha$ (alpha) particle ?

Q. Choose the correct statements regarding the characteristics of alpha particles.

1. Alpha particles are negatively charged species.
2. Alpha particles are positively charged species.
3. Alpha particles are identical to helium nucleus.
4. Alpha particles are electrically neutral.

Q.

The alpha particles carry___units of positive charge.

Q. The ratio of the radii of the atom to the nucleus is :

1. ${10}^5:1$
2. ${10}^{-4}:1$
3. ${10}^2:1$
4. ${10}^4:1$