Introduction Flashcards
Pure Substances
Constant composition, some physical and chemical properties throughout, cannot be separated into smaller substances.
Mixtures
Combination of two or more pure substances, can be separated by physical processes.
Elements
A pure substance that cant be separated into smaller substances by any chemical process.
Compounds
Pure substances composed of two or more different elements bonded together in fixed proportions, can be broken down into individual elements by chemical means.
Molecules
two of more atoms associated by bonds. Can be same or different elements.
Distillation
A process of using evaporation and condensation to separate a mixture of substances with different volities.
Volatility
Measuring vaporization.
Filtration
Process of separating solid particles from liquid by passing through porous material
Chromatography
A process involved stationary and mobile stage, separating mixtures based on their affinity.
Intensive Property
A property that is independent of the amount of substance present. Ex. Color, MP, BP
Extensive Property
A property that varies with the amount of substance present. Ex. Volume, Mass
Physical Property
Property of a substance that can be observed without changing into another substance.
Chemical Property
Property of a substance that is going through changes its chemical components
Density
A measure of how tightly packed (the particles in) a substance is.
Scientific Method
General explanation of widely observed phenoma
