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Class 10 Chemistry. Metals and Non metals. Elements are divided mainly into two groups on the basis of physical and chemical properties Metal and Non metal. Physical Properties of Metals: Hardness: Most of the metals are

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2003 11 19· Alkali metal: Alkali metal, any of Alkali metal, any of the six chemical elements that For lithium they include such procedures as selective extraction of lithium chlorideanic solvents and the detection of

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