Class-9-Science

Atoms and Molecules Problem Solving Session-3

In this session numerical related to mole concept and valency are solved.

Is Matter Around Us Pure Theory Session-1

In this session concept of pure and impure substance is discussed. Pure substances are classified into Elements and compounds. Properties of metals, nonmetals and metalloids are also discussed briefly.

Is Matter Around Us Pure Theory Session-2

In this session there is brief discussion about compounds, their classification based upon their source of origin and characteristics