Structure of the Atoms Test

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Structure of the Atoms Test - 22

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Weekly Quiz Competition

Question 1
1 / -0

Plum Pudding Model of the Atom was given by:

A
Thomson

B
Rutherford

C
Bohr

D
Chadwick

Solution

J. J. Thomson's model was also known as the plum pudding model according to which positive charge is distributed uniformly throughout the atom and negative charge is dispersed in it.

Hence, the correct option is $$A$$
Question 2
1 / -0

The element used by Rutherford in his famous scattering experiment was

A
Gold

B
Tin

C
Silver

D
Lead

Solution

Rutherford's alpha-particle scattering experiment is also known as the gold foil experiment as Rutherford used gold foil in it.
Option $$A$$ is correct.
Question 3
1 / -0

Which of the following represents Thomson's atomic model?

A

B

C

D
None of the above

Solution

Option $$C$$ represents the plum pudding model given by Thomson. He proposed that electrons are embedded in the positively charged sphere just like plums embedded in the pudding.
Question 4
1 / -0

The mass number of an element is 16. If it has 8 neutrons then valence shell of this element is.

A
K

B
L

C
M

D
N

Solution

Since mass number $$(A) = 16$$ and number of neutrons $$= 8$$
Atomic number$$(Z) = 16-8 = 8$$
Therefore, electronic configuration will be 2,6
Hence, $$L$$ is the valence shell and there are 6 electrons in it.
Question 5
1 / -0

A neutral atom of fluorine has a mass number of $$19$$ and an atomic number of $$9$$. How many neutrons does it have?

A
$$10$$

B
$$9$$

C
$$19$$

D
$$28$$

E
It is impossible to determine from the information given.

Solution

Mass number, $$A=19$$
Atomic number, $$Z=9$$
Number of neutrons=$$A-Z=19-9=10$$
Question 6
1 / -0

Goldstein's work with canal rays was apparently the first observation of the:

A
protons

B
electrons

C
neutrons

D
atoms

Solution

E. Goldstein in 1886 discovered the presence of new radiations in a gas discharge and called them canal rays. These rays were positively charged radiations which ultimately led to the discovery of another sub-atomic particle, known as a proton. Proton has a charge, equal in magnitude but opposite in sign to that of the electron.

So, the correct option is $$A$$
Question 7
1 / -0

The first model of an atom is given by:

A
Neils Bohr

B
Ernest Rutherford

C
J.J. Thomson

D
Eugen Goldstein

Solution

$$J.J.\ Thomson$$ gave the first model of an atom.
Question 8
1 / -0

What will be the number of protons, neutrons, and electrons present in $$^{59}_{27}Co$$ respectively,

A
$$27, 32, 27$$

B
$$27, 32, 26$$

C
$$59, 27, 29$$

D
$$59, 27, 27$$

Solution

In a neutral atom, number of protons = number of electrons
Here, the number of protons and electrons is $$27$$ and the number of neutrons $$= 59-27 = 32$$
Hence, option $$A$$ is correct.
Question 9
1 / -0

Calculate the number of neutrons present in the nucleus of an element $$X$$ which is represented as $$_{15}X^{31}$$.

A
20

B
25

C
12

D
16

Solution

The mass number is the sum of the number of protons and the number of neutrons.
Mass number = Number of Protons + Number of Neutrons
Therefore, number of Neutrons = Mass number - Number of Protons $$= 31-15 = 16$$
Question 10
1 / -0

Which of the following is the correct atomic number of Fluorine?

A
6

B
7

C
8

D
9

Solution

The atomic number of fluorine is $$9.$$. Therefore, the correct option is D.

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Structure of the Atoms Test - 22

Result

Structure of the Atoms Test - 22

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Question 1

Thomson

Rutherford

Bohr

Chadwick

Solution

Question 2

Gold

Tin

Silver

Lead

Solution

Question 3

None of the above

Solution

Question 4

K

L

M

N

Solution

Question 5

$$10$$

$$9$$

$$19$$

$$28$$

It is impossible to determine from the information given.

Solution

Question 6

protons

electrons

neutrons

atoms

Solution

Question 7

Neils Bohr

Ernest Rutherford

J.J. Thomson

Eugen Goldstein

Solution

Question 8

$$27, 32, 27$$

$$27, 32, 26$$

$$59, 27, 29$$

$$59, 27, 27$$

Solution

Question 9

20

25

12

16

Solution

Question 10

6

7

8

9

Solution

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