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Atoms & Bonding

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ion
an electrically charged atom or group of atoms formed by the loss or gain of one or more atoms
polyatomic ion
An ion made up of two or more atoms bonded together that acts as a single unit with a net charge.
valence electrons
electrons in the outermost energy level
ionic bond
the attraction between two oppositely charged ions, forms ionic compounds
ionic compound
composed of positive and negative ions that are combined so that the numbers of positive and negative charges are equal
chemical bond
force of attraction that holds 2 atoms together
chemical reaction
process in which substances under so chemical charges that result in the formula of new substances.
subscript
shares the ration, if none written it's one
crystal
orderly 3 dimensional arrangement of atoms
properties of metals
luster, brittle, malleable, ductile, good conductors of heat,electricity
covalent bond
bond formed when atoms shared electrons
molecule
a neutral group of atoms that are held together by one or more covalent bonds
single bond
a bond formed when two atoms share a pair of electrons
double bond
a covalent bond in which two pairs of electrons are shared between two atoms
triple bond
a covalent bond in which three pairs of electrons are shared by two atoms
polar bond
a covalent bond in which electrons are not shared equally
nonpolar bond
Covalent bond where electrons are shared equally
alloy
a mixture of two or more elements that has the properties of metals
metallic bond
an attraction between a positive metal ion and the electrons surrounding it
properties of ionic compounds
High melting and boiling points, conducts electricity as liquids or solutions, hard and brittle, solids at room temperature
properties of molecular compounds
low melting and boiling points, poor counducity, many are liquids at room temperature.
molecule compound
a chemical compound whose simplest units are molecules