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The top documents tagged [h hydrogen]
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h hydrogen
The Periodic Table
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AQA Physics A Particles, Quantum Phenomena and Electricity Unit 1: Particles, Quantum Phenomena and Electricity Dr K. A. Newson Head of Physics TGSG 2008.
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Natures Clock. When sedimentary rock is deposited in layers it is deposited horizontally. Scientists use this Principle of Original Horizontality to help.
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Elements All matter is made up of elements. Next > All chemical substances are made up of one or more of these elements. Over 100 are known to exist. Elements.
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Organic chemistry carbon and carbon cycle
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What is an element?
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How many electrons?
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