Structure of the Atoms Test

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Structure of the Atoms Test - 39

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Question 1
1 / -0

____________ is an obsolete scientific model of the atom proposed by J. J. Thomson in $$1904$$.

A
Musk melon model

B
Plum pudding model

C
Christmas melon model

D
Pudding model

Solution

J. J. Thomson proposed the model of an atom similar to a Christmas pudding or similar to a watermelon. His model of the atom is generally called the plum and pudding model of the atom.
Question 2
1 / -0

How is the number of rings in the Bohr's model of any element determined?

A
Column number on periodic table

B
Atomic mass

C
Row number on periodic table

D
Atomic number

Solution

As per the periodic table, there are seven electron shells which contain the same number of electrons. The orbit is nothing but rings. The number of rings in the Bohr model of an element is determined by row number on the periodic table. It corresponds to principal quantum number n.
Question 3
1 / -0

How would you describe J. J. Thomsons model of the atom?

A
An atom is indivisible

B
The atom is composed of only negatively charged particles.

C
The atom is composed of a positive core with negatively charged particles orbiting the positive core.

D
The atom is composed of diffused ball of positive charge with negative particles dispersed throughout.

Solution

The atom is composed of diffuse ball of positive charge with negative particles dispersed throughout like a watermelon where the red part is the positive sphere and the seeds represent negatively charged particles.

Hence, the correct option is $$D$$.
Question 4
1 / -0

The net charge inside an atom is zero because :

A
the magnitude of positive charge is more than negative charge inside atom

B
the magnitude of positive and negative charge is same inside atom

C
the magnitude of positive and negative charge is same outside atom

D
the magnitude of positive charge is less than negative charge inside atom

Solution

Thomson model of an atom is also known as Thomson's plum pudding model. In 1903, J. J. Thomson proposed the structure of an atom similar to that of a Christmas pudding. According to him, the magnitude of positive and negative charge is same inside atom, so net charge inside an atom is zero.
Question 5
1 / -0

In Thomson's model, _________ are embedded in a positively charged 'soup'.

A
electrons

B
neutrons

C
protons

D
ions

Solution

In Thomson's model, the atom is composed of electrons surrounded by a soup of positive charge to balance the electrons' negative charges, like negatively charged "plums" surrounded by positively charged "pudding" .
Question 6
1 / -0

Which of the following disproved Thomson's model?

A
The nuclear model of an atom

B
The electron model of an atom

C
The atomic model of an atom

D
None of above

Solution

Thomson's student, Ernest Rutherford conducted an experiment using gold foil which disproved Thomson's model. His model became known as the nuclear model of an atom.
Question 7
1 / -0

J.J. Thomson received noble prize in the year:

A
$$1900$$

B
$$1906$$

C
$$1909$$

D
$$1920$$

Solution

J.J. Thomson received noble prize in the year $$1906$$ for his work on electrical conductivity of gases.
Question 8
1 / -0

According to Thomson, an atom consists of:

A
embedded electrons

B
positively charged uniform sphere

C
negatively charged nucleus

D
Both A and B

Solution

According to the Thomson model, an atom consists of a positively charged sphere with electrons embedded in it. An atom as a whole is electrically neutral because the negative and positive charges are equal in magnitude.
Question 9
1 / -0

Thomson's atomic model suggested that the atom is:

A
not divisible

B
divisible

C
electrons revolve around nucleus

D
both A and C

Solution

Dalton's atomic theory suggested that all matter is made of indivisible atoms.

Thomson proposed a model of the atom which is also known as the plum pudding model. It suggested that the atom is divisible. It became clear as he proposed that the electrons are embedded in the positively charged sphere of an atom.
The concept of electrons revolving around the nucleus came only with Rutherford's model.
So. option B is correct.
Question 10
1 / -0

Thomson's model could not explain the :

A
stability of an atom

B
position of nucleus in an atom

C
scattering of alpha particles

D
all of above

Solution

Thomson model of an atom could not explain the stability of an atom, i.e., how a positive charge in the atom holds the negatively charged electrons. It could not explain the position of nucleus in an atom and the scattering of alpha particles.

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Re-Attempt Weekly Quiz Competition

Structure of the Atoms Test - 39

Result

Structure of the Atoms Test - 39

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SHARING IS CARING

Question 1

Musk melon model

Plum pudding model

Christmas melon model

Pudding model

Solution

Question 2

Column number on periodic table

Atomic mass

Row number on periodic table

Atomic number

Solution

Question 3

An atom is indivisible

The atom is composed of only negatively charged particles.

The atom is composed of a positive core with negatively charged particles orbiting the positive core.

The atom is composed of diffused ball of positive charge with negative particles dispersed throughout.

Solution

Question 4

the magnitude of positive charge is more than negative charge inside atom

the magnitude of positive and negative charge is same inside atom

the magnitude of positive and negative charge is same outside atom

the magnitude of positive charge is less than negative charge inside atom

Solution

Question 5

electrons

neutrons

protons

ions

Solution

Question 6

The nuclear model of an atom

The electron model of an atom

The atomic model of an atom

None of above

Solution

Question 7

$$1900$$

$$1906$$

$$1909$$

$$1920$$

Solution

Question 8

embedded electrons

positively charged uniform sphere

negatively charged nucleus

Both A and B

Solution

Question 9

not divisible

divisible

electrons revolve around nucleus

both A and C

Solution

Question 10

stability of an atom

position of nucleus in an atom

scattering of alpha particles

all of above

Solution

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