1. which of the following is true about elements?
a. they are impure substances
b. they cannot be classified by their properties alone
c.they cannot be broken down into simpler substances
d. they have more than one kind of particle
2. which of the following are considered pure substances?
a. compounds. b. elements. c. both elements and compounds. d. neither elements nor compounds
a. they are impure substances
b. they cannot be classified by their properties alone
c.they cannot be broken down into simpler substances
d. they have more than one kind of particle
2. which of the following are considered pure substances?
a. compounds. b. elements. c. both elements and compounds. d. neither elements nor compounds
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