What are the building blocks of matter?

Important Questions on Atoms and Molecules

EASY

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Very Short Answer Type Questions>Q 12

How the size of an atom is indicated?

EASY

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Very Short Answer Type Questions>Q 13

Name the unit in which the radius of an atom is usually expressed.

EASY

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Very Short Answer Type Questions>Q 14

Write the relation between nanometer and metre.

EASY

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Very Short Answer Type Questions>Q 15

The radius of an oxygen atom is $0.073 \mathrm{nm}$. What does the symbols '$\mathrm{nm}$' represent?

EASY

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Very Short Answer Type Questions>Q 16

Why is it not possible to see an atom even with the most powerful microscope?

EASY

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Very Short Answer Type Questions>Q 17

The symbol of element cobalt is $\mathrm{CO}$

EASY

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Very Short Answer Type Questions>Q 18

Define 'molecular mass' of a substance.

EASY

9th CBSE

IMPORTANT

Science for Ninth class Part 2 Chemistry>Chapter 3 - Atoms and Molecules>Very Short Answer Type Questions>Q 19

What is meant by saying that 'the molecular mass of oxygen is $32$'?