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Recent questions in Chapter 4 Measurement of Matter

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Explain with examples what is meant by a 'mole' of a substance.
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What is meant by Unified Atomic Mass
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Explain how the element sodium is monovalent.
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Give example Trivalent basic radicals
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give example Bivalent acidic radicals
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Give example Metals with variable valency
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Give example Composite radicals
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Give examples Basic radicals
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