Basic Chemistry Concepts

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Chemical reactions

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When one or more substances are changed into different substances.

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Reactants

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The chemicals present at the beginning of the reaction.

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Products

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The chemicals created at the end of the reaction.

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Synthesis reaction

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Two or more reactants combine to form a single product.

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Decomposition reaction

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A single compound is broken down into two or more products.

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Single replacement reaction

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An uncombined element replaces an element that is part of a compound.

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Double replacement reaction

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Takes the form of AB + CD → AD + CB where A and C are positively charged cations, while B and D are negatively charged anions.

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Anion

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A negatively charged ion.

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Cation

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A positively charged ion.

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Atoms

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The basic particles of the chemical elements.