|Class 9 Chemistry Atoms and Molecules||Introduction|
The entire Universe is composed of matter and energy. Energy is the aptitude to perform a work. On the other hand matter has mass and occupies space. Maharishi kannad postulated that if we go on dividing matter we will derive smaller and smaller particles which on further division gives off further smaller particles finally leading to the derivation of the smallest particle that cannot be further divided. He named these particles to be parmanu or atom. Matters are composed of basic elements that cannot be broken down to substances with different chemical or physical properties.