Chapter 4: Structure of the Atom MCQs | science Class 9 CBSE

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Question 1

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Who discovered the proton?

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Question 2

Objective

Which subatomic particle is neutral?

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Question 3

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Bohr’s model proposed:

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Question 4

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Which of these is an isotope of hydrogen?

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Question 5

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Atomic number of carbon is:

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Question 6

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Mass number = ?

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Question 7

Objective

Which is correct configuration for sodium (Z=11)?

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Question 8

Objective

Which of these is an isobar?

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Question 9

Objective

Electron was discovered in:

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Question 10

Objective

Valency of oxygen is:

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Question 11

Objective

Which shell is closest to the nucleus?

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Question 12

Objective

Which element has no neutron?

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Question 13

Objective

Which scientist discovered neutrons?

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Question 14

Objective

Charge on an electron is:

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Question 15

Objective

What is the maximum electrons in L shell?

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Question 16

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Who gave the plum pudding model?

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Question 17

Objective

Which particle has mass but no charge?

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Question 18

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What is the valency of nitrogen (Z=7)?

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Question 19

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Which is not a correct pair?

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Question 20

Objective

Symbol for atomic number is:

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Chapter sections

Chapter 4: Structure of the Atom | MCQs

Who discovered the proton?

Which subatomic particle is neutral?

Bohr’s model proposed:

Which of these is an isotope of hydrogen?

Atomic number of carbon is:

Mass number = ?

Which is correct configuration for sodium (Z=11)?

Which of these is an isobar?

Electron was discovered in:

Valency of oxygen is:

Which shell is closest to the nucleus?

Which element has no neutron?

Which scientist discovered neutrons?

Charge on an electron is:

What is the maximum electrons in L shell?

Who gave the plum pudding model?

Which particle has mass but no charge?

What is the valency of nitrogen (Z=7)?

Which is not a correct pair?

Symbol for atomic number is:

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