Unit 4 Chemical Formulas Flashcards

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1
Q

occurs when one or more substances are changed into new substances with different properties; cannot be undone by physical means

A

chemical reaction

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2
Q

Chemical formulas and symbols written to represent a reaction

A

chemical equation

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3
Q

A shorthand notation that uses chemical symbols and numbers as subscripts to represent the type and number of atoms that are present in the smallest unit of the substance.

A

chemical formula

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4
Q

a one or two letter notation used to represent an atom of a particular element; sometimes referred to as an atomic symbol

A

chemical symbol

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5
Q

a number placed in front of a chemical symbol or formula in order to balance the equation

A

coefficient

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6
Q

a reaction that gets cold because heat energy is absorbed from the surrounding area

A

endothermic

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7
Q

a reaction that gets hot as heat energy is released to the surrounding area

A

exothermic

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8
Q

the mass of all the reactants must equal the mass of all the products; matter is neither created nor destroyed

A

law of conservation of mass

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9
Q

occurs when one or more physical properties of a substance are changed; many can be undone by physical means

A

physical change

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10
Q

a solid that falls out of a liquid solution during a chemical reaction

A

precipitate

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11
Q

a substance produced during a chemical reaction

A

product

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12
Q

a substance that takes part in and undergoes change during a reaction

A

reactant

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13
Q

a number written below and to the right of a chemical symbol that shows the number of a specific type of atom present in a molecule

A

subscript

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14
Q

to produce

A

yield

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