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Chemistry IX | Matter-Its Nature and Behaviour | Part 2
Matter-Its Nature and Behaviour | Part 2 Compounds · A compound is a substance made up of two or more elements chemically combined in a fixed proportion by weight e.g., water, NaCl, NH4Cl and CO2, etc., Properties of Compounds · A compound cannot be separated into its components by physical methods. · The properties of…
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Chemistry IX | Structure of Atom | Part 2
Structure of Atom | Part 2 I. Thomson’s Atomic Model The first simple model of an atom was proposed by J.J. Thomson. According to this model an atom consists of a uniform sphere (radius approx 10 – 10 m) of positive charge with electron embedded in such a way so as to give most stable…