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2.1 The New Periodic Table Song
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2.2 naming organic compounds
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2.3 History of Periodic table
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2.4 IUPAC nomenclature of the Inorganic compound
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2.5 the nomenclature of inorganic substances
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2.6 Hard and Soft Acids and Based
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2.7 Hard and soft Acids and Bases
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2.8 nomenclature of Hydrocarbons