- | Page
CHEM 120 EXAM #1 QUESTIONS
WITH CORRECT ANSWER: S
Question : define matter
CORRECT ANSWER: : anything that has mass and takes up space
Question : what is not considered matter?
CORRECT ANSWER: : light, heat, electricity
Question : definite shape, definite volume
CORRECT ANSWER: : solid
Question : indefinite shape, definite volume
CORRECT ANSWER: : liquid
Question : indefinite shape, indefinite volume
CORRECT ANSWER: : gas
Question : pure substance
- | Page
CORRECT ANSWER: : one substance; definite and constant composition; can't be separated into 2 kinds of matter by physical means; single kind of matter
Question : heterogeneous mixture
CORRECT ANSWER: : nonuniform in appearance; visibly different phases
Question : homogeneous mixture
CORRECT ANSWER:: visibly one distinct phase; uniform properties
Question : examples of pure substances
CORRECT ANSWER: : water, sugar, table salt
Question : examples of heterogeneous mixtures
CORRECT ANSWER: : trail mix, chocolate chip cookies, cereal and mix
Question : examples of homogeneous mixtures
- | Page
CORRECT ANSWER: : chocolate milk, orange juice, salt water
Question : element v compound
CORRECT ANSWER: : can't be broken down into simpler substances by chemical or physical means -v- can be broken down into elements by chemical, but not physical means
Question : mixture v compound
CORRECT ANSWER: : physical combinations of substances -v- chemical combination of substances
Question : most abundant elements in the universe as a
whole plus in earth's crust CORRECT ANSWER: : hydrogen and oxygen
Question : two most abundant elements in the earth's crust
CORRECT ANSWER: : oxygen and silicon
- | Page
Question : Ag
CORRECT ANSWER: : silver
Question : Al
CORRECT ANSWER: : aluminum
Question : Ar
CORRECT ANSWER: : argon
Question : Au
CORRECT ANSWER: : gold
Question : B
CORRECT ANSWER: : boron
Question : Ba
CORRECT ANSWER: : barium