MEDIUM
9th CBSE
IMPORTANT
Earn 100

Define the term symbol of an element. Why are Dalton's symbols not used in chemistry?

Important Questions on Atoms and Molecules

MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 15
Write the chemical formula of Hydrogen sulphide.
MEDIUM
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 15
Write the chemical formula of Iron (ll) Chloride. 
EASY
9th CBSE
IMPORTANT
LIVING SCIENCE CHEMISTRY 9>Chapter 3 - Atoms and Molecules>Practice Questions>Q 16
What are polyatomic ions? Give examples.
MEDIUM
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?
MEDIUM
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.
MEDIUM
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?
MEDIUM
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?