The name of ${\mathrm{Li}}_3\mathrm{N}$ is lithium nitrite.

Important Questions on Atoms and Molecules

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? 

EASY

9th CBSE

IMPORTANT

Together with Science Class 9>Chapter 3 - Atoms and Molecules>ASSESS YOURSELF>Q 31

Calculate the number of molecules in $8$ g of ${\mathrm{O}}_2$?