MEDIUM
9th CBSE
IMPORTANT
Earn 100

Define atomic mass unit. What is its symbol?

Important Questions on Atoms and Molecules

MEDIUM
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 3 - Atoms and Molecules>Exercise>Q 19

What does it mean by saying 'atomic mass of oxygen is 16'?

EASY
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 3 - Atoms and Molecules>Exercise>Q 20

Define 'molecule'.

MEDIUM
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 3 - Atoms and Molecules>Exercise>Q 21
Define molecule of an element. Give one example.
MEDIUM
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 3 - Atoms and Molecules>Exercise>Q 22
Define molecule of a compound. Give one example.
EASY
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 3 - Atoms and Molecules>Exercise>Q 23

Define electronegativity.

EASY
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 3 - Atoms and Molecules>Exercise>Q 24

What is meant by molecular mass?

EASY
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 3 - Atoms and Molecules>Exercise>Q 25

In what form atoms can exist in an aqueous solution? Give examples.

MEDIUM
9th CBSE
IMPORTANT
Chemistry for Class IX>Chapter 3 - Atoms and Molecules>Exercise>Q 1

State the law of conservation of mass. Give one example to illustrate this law.