chemistry second ABCD Flashcards
what is an atom
smallest indivisible particle of matter
what is a molecule
two or more atoms
what is an element
a pure substance consisting of only one atom
What is a compound
a substance consisting of two or more elements
what is a boiling point
the temperature at which a liquid turns into a gas upon heating
properties of a solid
fixed shape and volume particles are closely packed and vibrate in place
what is a homogeneous muxture
uniform composition throughout
properties of a liquid
Does not have a fixed shape and particles are loosely spaced
prpoerties of gas
no fixed shape or volume and particles are widely spaced
what is a heterogeneuos mixture
non uniform composition
what are colloids example
Mixtures where tiny particles are dipersed but not settled e.g milk
what are suspensions
mixtures where the large particles settle over time e.g muddy water
what are alloys
Mixtures of metals e.g steel and bronze
what are emulsions
mixtures of two immiscible liquids
what is simple distilation used for
separating mixtures of solid and liquid solutions
what is chromatography used for
separating components based on their movement through a medium
what is fractional distillation used for
separating mixtures of liquids with similar boiling points
what is centrifugation used for
separating mixtures of different densities
