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26 Cards in this Set

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  • Back
matter
anything that has mass and occupies space
solid
definite shape and volume, particles cohere rigidly to one another
crystalline
particles exist in a regular, repeating, 3 dimensional pattern
amorphous
particles do not have any regular, internal geometric pattern
liquid
definite volume, but not definite shape, particles cohere firmly but no rigidly
gas
indefinite volume and no fixed shape, particles move independent of one another
substance
matter with a definite and and fixed composition, either elements or compounds
homogenous
matter which is uniform in appearance and has the same properties throughout
heterogenous
matter consisting of two or more physically distinct phases
phase
a homogenous part of a system separated from other parts of the system
mixture
a material containing 2 or more substances, can be either homo or heterogenous
element
basic building block for the atom that cannot be broken down into simpler substances
atom
the smallest particle of an element that can enter into a chemical reaction
symbol
an abbreviation for the name of an element
metal
an element that is solid at room temperature and whose properties include luster, ductility, malleability, good conductors of heat and temperature, metals tend to lose their valence electrons and become positive ions
nonmetal
an element that has properties the opposite of metals: lack of luster, relatively low melting point and density and generally poor conductor of heat and electricity- many are gases (bromine/mercury)
metalloid
element having properties that are intermediate between those of metals and nonmetals, very useful in electronics
compound
a distinct substance composed of 2 or more elements combined in definite proportions, may be decomposed into simpler substances
molecular compounds
a compound joined by atoms of a covalent bond
ionic compounds
a compound in which ions are bound by electrostatic interactions of cations and anions
molecule
smallest uncharged individual unite of a compound foremd 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
set of elements which do not exist as free individual atoms but as 2 atom molecules: H2, N2, O2, F2, Cl2, Br2 and I2
chemical formula
abbreviation for compounds, shows symbols and the ratio of the atoms of the elements in the compound