Nature and Behaviour Definition of matter; solid, liquid and gas; characteristics - shape, volume, density; change of state-melting (absorption of heat), freezing, evaporation (cooling by evaporation), condensation, sublimation. -Nature of matter: Elements, compounds and mixtures. Heterogenous and homogenous mixtures, colloids and suspensions. -Particle nature, basic units: Atoms and molecules, Law of constant proportions, Atomic and molecular masses. Mole concept : Relationship of mole to mass of the particles and numbers. -Structure of atoms: Electrons, protons and neutrons, valency, chemical formula of common compounds. Isotopes and Isobars. - Study24x7
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Nature and Behaviour Definition of matter; solid, liquid and gas; characteristics - shape, volume, density; change of state-melting (absorption of heat), freezing, evaporation (cooling by evaporation), condensation, sublimation. -Nature of matter: Elements, compounds and mixtur...

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