Physical Science Chapter 6 study guide

compound
a substance composed of more than one type of atom linked together chemically

colloid
a mixture containing tiny clumps or particles that remain suspended within the mixture

solution
a uniform mixture in which one substance is dissolved in another substance

empirical formula
a type of formula that gives only the simplest ration of atoms in a molecule

mixture
tow or more elements or compounds physically mixed but not chemically united

molecular formula
a type of formula that gives the number of each type of atom in a molecule

polar covalent bond
a bond formed if one of the atoms in a covalent bond has a stronger electrical attraction for the shared electrons than does the other atom resulting in a molecule with oppositely charged ends or a dipole molecule.

solute
a substance that is dissolved into a solvent

ionic bond
type of chemical bond in which a positive ion is attracted to a negative ion

chemical bond
the force of attraction that holds atoms together in a molecule or ionic crystal

covalent bond
a chemical bond resulting from the sharing of valence electrons between atoms

dipolar force
an intermolecular force that exists between polar molecules

London force
a weak intermolecular force that exists between all molecules

melting point
the temperature at which molecules of a solid break loose from their rigid intermolecular bonds a form a liquid

boiling point
the point at which the vapor pressure of a liquid is equal to the atmospheric pressure above it

vapor pressure
the tendency of molecules of a liquid to evaporate at a given temperature

molecular mass
the sum of the atomic masses of all the atoms in a molecule stated in atomic mass units

solubility
the ability of one substance to be dissolved in another substance

solvent
a substance that dissolves another substance