Chemistry

accuracy
how close a result comes to the true value.
precision
the consistency of the values it produces. (the closeness of two or more measurements to each other)
Intensive property
physical property NOT related to size or amount.
extensive property
physical property directly related to the size/amount of a sample
malleable
a substance that can be bent and flattened
ductile
a substance that can be drawn out
ferromagnetic
having a high susceptibility to magnetization. Can be permanently turned into magnets
pure substance
has consistent and definable physical and chemical properties
element
CANNOT be separated into simpler substances through any chemical or physical change
compound
CAN be separated into simpler substances through chemical reactions
elements
the simplest substances.
compounds
formed when elements are chemically bonded in a definite ratio
mixture
formed when substances are placed together which will NOT chemically react. NOT formed with any definite ratio.
mixtures
can be separated based on the physical properties of the substances.
heterogeneous mixture
the substances within the mixture are distinct and easily identified (can see the different substances)
homogeneous mixture
the substance within the mixture are blended evenly together (can’t tell one from the other)
physical property
characteristics of a substance that can be used to describe it: size, shape, temperature
physical change
changing a physical property like size, shape, or temperature of a substance
chemical property
property of matter which describes its tendency to react with other substances
chemical change
any change that results in the formation of new chemical substances
melting
a physical process through which a substance changes from a solid to a liquid usually by applying heat
freezing
the physical process through which a substance changes from a liquid to a solid.
evaporation
the process of a substance in a liquid state changing to a gaseous state
condensation
the process of a substance in a gaseous state transforming into a liquid state.
sublimation
the transition of a substance directly from the solid to the gas phase (skips liquid)
solids
not compressible, have a definite shape and volume, volume will not change
liquids
compressible, conforms to the shape of its container, won’t change volume
gases
easily compressible, no definite shape or volume, changes volume when put into a container
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