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Unit 1

Investigating Chemicals

TermDefinition
ELEMENT A SUBSTANCE THAT ONLY CONTAINS ONE KIND OF ATOM
PURE SUBSTANCE CONTAINS ONLY ONE TYPE OF ELEMENT
CHEMICAL SYMBOL USED TO REPRESENT AN ELEMENT IN CHEMISTRY BY USING ONE LETTER OR TWO LETTER SET OF CHARACTERS TO IDENTIFY AN ELEMENT
COMPOUND A SUBSTANCE MADE UP OF TWO OR MORE ELEMENTS THAT ARE CHEMICALLY COMBINED IN A SPECIFIC RATIO, OR PROPORTION
CHEMICAL FORMULA A COMBINATION OF SYMBOLS THAT REPRESENT THE ELEMENTS OF IN A COMPOUND (EX. TABLE SALT -NaCl)
SUBSCRIPT SHOWS THE NUMBER OF ATOMS OF AN ELEMENT
EVIDENCE OF A CHEMICAL CHANGE COLOR CHANGE, PRODUCTION OF GAS, CHANGE IN TEMPERATURE, PRODUCTION OF PRECIPITATE
CHEMICAL CHANGE FORMS ONE OR MORE NEW SUBSTANCES
PRECIPITATE A SOLID THAT FORMS FROM A SOLUTION DURING A CHEMICAL REACTION (CHANGE)
PHYSICAL CHANGE A CHANGE THAT ALTERS THE FORM OR APPEARANCE OF A MATERIAL BUT DOES NOT CONVERT THE MATERIAL INTO A NEW SUBSTANCE
PHYSICAL PROPERTIES CHARACTERISTICS OF A SUBSTANCE THAT ARE OBSERVED WITHOUT CHANGING THE SUBSTANCE INTO SOMETHING ELSE.