Flashcards on vocabulary
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infront of, before
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pro-
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one or two letters
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symbol(s)
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A combination of symbols and numbers that represent the number and types of elements (atoms) presented in a compound
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chemical formula
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a small number to the right of a symbol that is written below the normal line of letters to show how how many atoms of an element are presented in a substance . no subscript means there is only one atom presented
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subscript
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when substances interact to form one or more new substances with different properties than the original substances
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chemical reaction
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a combination of chemical formulas used to describe what happens in a chemical reaction. the equation identifies the reactants and resulting products .
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chemical equation
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a number written in front of a chemical formula to show how many molecules of that substances are present
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coefficient
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Formulas written on the left side of the arrow symbol are the starting substances in a chemical reaction
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reactant
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Formulas written on the right side of the arrow symbol are the new substances formed in a chemical reaction.
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product
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an arrow symbol that shows a reaction has taken place. the reactants have reacted to produce a new substance (the product)
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yields
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a substance composed of two or more elements chemically combined and in a definite proportion
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compound
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a change in which the characteristics of a substance are only changed physically and the original properties stay the same
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physical change
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a change in which a substance (Or substances) is changed into one or more new substances with different properties than the original substances
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chemical change
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matter is not created or destroyed , only changed . the number of atoms in the product
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Law of conservation of mass
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a solid that forms as a result of a chemical reaction . it will fall to the bottom of the container
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precipitate
