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Chemistry is the study of matter and energy and the interactions between them. Get facts for the elements in the periodic table. Find chemistry demonstrations and experiments and science fair projects. Get chemistry homework help with worked example ...

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Definition of word from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games.

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The definitive online periodic table reference site including technical data, and photographs and descriptions of thousands of samples of the chemical elements.

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This WebElements periodic table page contains Essential information for the element ununhexium