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12 Cards in this Set

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  • Back
Compounds can be broken down into simpler substances by chemical mean, but elements cannot?
yes
chemical change
a change that produces matter with a different composition than the original matter
If the composition of a material is fixed, the material is a substance. if the composition of amaterial may vary, the material is a mixture
yes
chemists use chemical symbols to represent compounds and chemical formulas to represent elements
false swap the two
chemical symbol
a one or two lettered symbol for elements. first letter is uppercase and second is lowercase
chemical property
the ability of a substance to undergo a specific chemical change
during a chemical change, the composition of matter always changes
true
chemical reaction
one or more substances change into one or more new substances
reactant
a substance that present at the start of the reaction
product
a substance that is produced in the reaction
precipitate
a solid that forms and settles out of a liquid during a chemical reaction
law of conservation of mass
in a physical or chemical reaction, no mass is gained or lost