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science chapter 5

atoms and bonding

TermDefinition
valence electrons the electrons that are in the highest energy level of a atom and that are involved in chemical reactions
electron dot diagram a method of writing the chemical symbol of an element by surrounding it with dots to indicate the number of valence electrons
chemical bond a lasting attraction between atoms, ions or molecules that enables the formation of chemical compounds
ion an atom or molecule that has a non-zero net electrical charge
polyatomic ions a charged chemical species composed of two or more atoms covalently bonded or of a metal complex that can be considered to be acting as a single unit.
ionic bond a type of chemical bonding that involves the electrostatic attraction between oppositely charged ions, and is the primary interaction occurring in ionic compounds
ionic compound an ionic compound is a chemical compound composed of ions held together by electrostatic forces termed ionic bonding
chemical formula a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule
subscript a character (number, letter or symbol) that is (respectively) set slightly below or above the normal line of type
crystal a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure
covalent bonds a chemical bond that involves the sharing of electron pairs between atoms.
molecule an electrically neutral group of two or more atoms held together by chemical bonds.
double bond a chemical bond between two chemical elements involving four bonding electrons instead of the usual two
triple bond a chemical bond between two atoms involving six bonding electrons instead of the usual two in a covalent single bond
molecular compound a compound that is composed of molecules
polar bond In a molecule of hydrogen fluoride
nonpolar bond a covalent bond in which electrons are shared equally
alloy a mixture of two or more elements; one of which is metal
metallic bond a attraction between a positive metal ion and electrons surrounding it
Created by: 088103