EASY
9th CBSE
IMPORTANT
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One mole of sodium sulphate contains 2 atoms of Na, 1 atom of S, 4 atoms of oxygen.

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Important Questions on Atoms and Molecules

EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 21
The name of Li3N is lithium nitrite.
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 24
Which unit is used to measure the atomic radius? Convert it into metre. 
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 25
Name the smallest particle of an element that can retain all the chemical properties.
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 26
Why is it not possible to see an atom with the unaided eyes?
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 27
Write the formula of lead phosphate.
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 28
What is meant by the valency of an element? 
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 29
What helps in determining the formula of an ionic compound? 
EASY
9th CBSE
IMPORTANT
Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 30
What is meant by molar mass?