After completing this lesson, you will be able to:

- define various states of matter as solid, liquid and gas, and distinguish one from the other based on their properties;

- classify the matter based on their composition as element, compound and mixture;

- differentiate between atoms and molecules;

- state Dalton’s atomic theory and explain various laws of chemical combinations;

- define isotopes, atomic mass and molecular mass;

- express chemical reaction in form of a balanced chemical equation;

- define mole concept and molar quantities such as molar mass and molar volume;

- apply mole concept to a chemical reaction and show a quantitative relationship between masses of reactants and products;

- define Gay Lussac’s law of combining volume and Avogadro’s law;

- solve numerical problems based on various concepts covered above;