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9th CBSE
IMPORTANT
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Write the chemical formula of Iron (ll) Chloride. 

Important Questions on Atoms and Molecules

EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 16
What are polyatomic ions? Give examples.
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9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 17
What is the molecule C60 called? What type of shape does it have?
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9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 1
What do you understand by the law of constant proportions? Illustrate it with two examples.
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9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 2
What are the postulates of Dalton's atomic theory?
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9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 3
What is atomic mass unit? Is atomic mass unit a practical unit?
HARD
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 4
If the mass of  12C  atom is 1.9924×10-23 g, what is the mass of 1 u? 
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 5
Why is it that the elements have fractional atomic masses?
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9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 6
How is the atomic mass of an element different from the actual mass of an atom?