Structure of the Atoms Test

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Structure of the Atoms Test - 1

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Weekly Quiz Competition

Question 1
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Which of the following is/are regarded as universal particle(s)?

A
Proton

B
All of these

C
Electron

D
Neutron

Solution

Explanation:

Electrons are present in atoms of all the elements. They are distributed around the nucleus in an atom. The charge/mass (e/m) ratio of electrons is constant in all elements. Hence, an electron is regarded as a universal particle.
Question 2
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Who discovered anode rays?

A
Rutherford

B
Chadwick

C
Goldstein

D
J. J. Thomson

Solution

Explanation:

Anode rays were discovered by E. Goldstein as canal rays. These rays consist of positively charged particles. Goldstein called these positive rays as "channel rays" or "canal rays" because they were produced by the holes or channels in the cathode.
Question 3
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‘Christmas Pudding Model’ of an atom was suggested by :

A
Stony

B
J. J.Thomson

C
Rutherford

D
Neils Bohr

Solution

Explanation:

Christmas pudding model of an atom was proposed by J.J.Thomson. According to this model, an atom is a positively charged sphere in which negatively charged electrons are embedded.
Question 4
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Who discovered neutron?

A
Maxwell

B
J. J. Thomson

C
Rutherford

D
Chadwick

Solution

Explanation:

Neutron was discovered by James Chadwick. Neutron is a neutral sub-atomic particle having a mass almost equal to the mass of proton.
Question 5
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How many times is the radius of extra nuclear portion more than that of the nucleus of an atom?

A
Five times

B
2 times

C
3 times

D
10 times

Solution

Explanation:

The nuclear region is a small portion of the atom as compared to the space inside an atom.
Question 6
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Who received the Noble Prize for the work on the structure of an atom?

A
J. J. Thomson

B
Neils Bohr

C
J. Chadwick

D
E. Rutherford

Solution

Explanation:

Neils Bohr received the Noble Prize in Physics in 1922 for his work on the structure of an atom. He proposed the Bohr model of atom having discrete shells in which the electrons are distributed.
Question 7
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What was the source of alpha particles in Rutherford's scattering experiment?

A
All of these

B
Helium nucleus

C
Hydrogen nucleus

D
Neon nucleus

Solution

Explanation:

In Rutherford's alpha particle scattering experiment, the source of alpha particles was a Helium nucleus.
Question 8
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Out of L and M shells, which is nearer to the nucleus of an atom?

A
M

B
Both are equally near to the nucleus of an atom

C
L

D
None of these

Solution

Explanation:

The order of shells around the nucleus is K, L, M, N from the nucleus. So, L shell is nearer to the nucleus than M shell.
Question 9
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Find the incorrect statement.

A
Most of the space in atom is empty.

B
Proton is a universal particle.

C
A neutron is slightly heavier than a proton.

D
Neutrons were known at the time when Rutherford performed the scattering experiment.

Solution

Explanation:

Proton is not considered as a universal particle. An electron is considered as a universal particle.
Question 10
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“Electrons present in the extra nuclear portion are not stationary rather they revolve around the nucleus at high speed following a circular path”. Who said this?

A
Neils Bohr

B
Rutherford

C
Chadwick

D
J. J. Thomson

Solution

Explanation:

In his model of atom, Rutherford stated that electrons present in the extra nuclear portions are not stationary; rather they revolve around the nucleus at high speed and follow a circular path.

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Structure of the Atoms Test - 1

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Structure of the Atoms Test - 1

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Question 1

Proton

All of these

Electron

Neutron

Solution

Question 2

Rutherford

Chadwick

Goldstein

J. J. Thomson

Solution

Question 3

Stony

J. J.Thomson

Rutherford

Neils Bohr

Solution

Question 4

Maxwell

J. J. Thomson

Rutherford

Chadwick

Solution

Question 5

Five times

2 times

3 times

10 times

Solution

Question 6

J. J. Thomson

Neils Bohr

J. Chadwick

E. Rutherford

Solution

Question 7

All of these

Helium nucleus

Hydrogen nucleus

Neon nucleus

Solution

Question 8

M

Both are equally near to the nucleus of an atom

L

None of these

Solution

Question 9

Most of the space in atom is empty.

Proton is a universal particle.

A neutron is slightly heavier than a proton.

Neutrons were known at the time when Rutherford performed the scattering experiment.

Solution

Question 10

Neils Bohr

Rutherford

Chadwick

J. J. Thomson

Solution

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