Matter Flashcards
What is a substance?
ALL elements and compounds are substances
what qualifies as a physical change?
cutting, freezing, melting, dissolving
what qualifies as a chemical change?
rusting, burning
what is an element
the simplest form of matter
what are the diatomic elements?
H2, N2, O2, F2, Cl2, Br2, I2
what is a compound
compounds consist of 2 or more elements and can be separated by chemical means
what is a mixture
mixtures are physical combinations of 2 or more pure substances with no definite ratio
do each substances in a mixture retain or combine their properties
retain
what is a homogenous mixture
looks uniform throughout
what is a heterogenous mixture
not uniform throughout
what is filtration
a process by which a precipitate is recovered from a mixture of
filtration is used only by…
heterogenous mixtures
what is distillation
simultaneous boiling of a liquid and condensation of its vapor
what is distillation based on
boiling point differences
what separates colors when using chromatography
differences in solubility and polarity
