Chemistry Concepts

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Subscript

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The number written after an element's symbol in a chemical formula that indicates the number of atoms of a specific element.

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Chemical Formula

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A shorthand representation of an element or compound using chemical symbols.

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Chemical Equation

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A representation of a chemical reaction using chemical symbols for elements and compounds.

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Molecule

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Two or more atoms chemically combined.

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Coefficient

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The number in front of an element or compound that indicates the number of molecules in a chemical formula.

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Reactants

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Reactants are the starting substances in a chemical reaction.

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Products

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Elements or compounds on the right side of a chemical equation.

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The number of atoms for each element are equal for the reactants and products.

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Balanced Equation

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Unbalanced Equation

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The number of atoms for each element are not equal for the reactants and products.

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Law of Conservation of Mass

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The total mass of reactants equals the total mass of products in a chemical reaction.