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28 Cards in this Set

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  • Back
natter
anything that has mass and takes up space
solid
has a definite shape and volume, with particles that cohere ridgidly to one another
amorphous solids
without shape or form
liquid
has a definite volume but not a definite shape, with particles that cohere firmly but not rigidly
gas
indefinite volume and no fixed shapes, with particles that move independently of one another
substance
a particular kind of matter with a definite, fixed composition
homogeneous
matter is uniform in appearance and has the same properties throughout
heterogeneous
matter consisting of two or more physically distinct phases
phase
a homogeneous part of a system separated from other parts by physical boundaries
system
simply the body of matter under consideration
mixture
a material containing two or more substances and can be either heterogeneous or homogeneous
element
a fundamental or elementary substance that cannot be broken down by chemical means to simpler substances
atom
the smallest particle of an element that can exist, also the smallest unit of an element that can enter into a chemical reaction
symbol
an elements abbreviation
metals
solids at room temp, high luster, malleable, ductile, and good conductors of heat and electricity, high melting point and high density
nonmetals
not lustrous, have relatively low melting points and densities, poor conductors of heat and electricity
metalloids
have properties that are intermediate between those of metals and those of nonmetals
compound
a distinct substance that contains two or more elements chemically combined in definite proportions by mass
molecule
the smallest uncharged individual unit of a compound formed by the union of two or more atoms
ion
positively or negatively charged atom or group of atoms
cation
positively charged ion
anion
negatively charged ion
diatomic molecules
molecules of elements that always contain two atoms
chemical formula
shows the symbols and the ratio of the atoms of the elements in a compound
subscripts
numbers that appear partially below the line and to the right of a symbol of an element
states of matter
solid, crystalline, amorphous, liquid, as
amorphous
exist without a regular, repeating 3-d geometric pattern
crystalline
exist in regular, repeating 3-d geometric patterns