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100
Chemical Bond 
An electrical attraction between the nuclei and valence elections of different atoms that binds the atoms together. 
100

A neutral group of atoms that are held together by covalent bonds. 

Molecule
100

A compound composed of positive and negative ions that are combined so that the numbers of positive and negative charges are equal. 

Ionic compound
100

The chemical bonding that results from the attraction between metal atoms and the surrounding sea of electrons. 

Metallic bonding
100
Repulsion between the sets of valence-level electrons surrounding an atom causes these sets to be oriented as far apart as possible. 
VSEPR Theory 
200
Ionic Bonding
A chemical bond that results from the electrical attraction between cations and anions. 
200

The types and numbers of atoms combined in a single molecule of a molecular compound.

 Molecular formula

200

The simplest collection of atoms from which an ionic compounds formula can be established.

Formula unit
200

The ability of a substance to be hammered or beaten into. 

Malleability
200

Orbitals of equal energy produced by the combination of two or more orbitals on the same atom. 

Hybrid orbitals
300
Covalent Bonding
Sharing of election pairs between two atoms. 
300

The energy required to break a chemical bond and form neutral isolated atoms. 

Bond Energy


300

The energy released when one mole of an ionic crystalline compound is formed from gaseous ions. 

Lattice Energy 
300

The ability of a substance to be drawn, pulled, or extruded through a small opening to produce wire. 

Ductility 
300
Is created by equal but opposite charges that are separated by a short distance. 
Dipole
400

A covalent bond in which the bonded atoms have an unequal attraction for the shared electrons.

Nonpolar-covalent bond

400

The kind, number, arrangement, and bonds but not the unshared pairs of the atoms.

The kind, number, arrangement, and bonds but not the unshared pairs of the atoms. Structural Formula

400

A charged group of covalently bonded atoms.

Polyatomic ions

400
amount of energy absorbed as heat when a specified amount of a substance vaporizes at constant pressure. 
Enthalpy of Vaporization
400
The intermolecular force in which a hydrogen atom that is bonded to a highly electronegative atom is attracted to an unshared pair of electrons of an electronegative atom in a nearby molecule. 
Hydrogen bonding
500

A bond that has an uneven distribution of charge. 

polar
500

Bonding in molecules or ions that cannot be correctly represented by a single Lewis Structure. 

resonance
500
Ions that minimize their potential energy by combining in an orderly arrangement. 
Crystal lattice
500
Electrons that do not belong to any one atom but move freely about the metals network of empty atomic orbitals. 
Delocalized
500
The intermolecular attractions resulting from the constant motion of electrons and the creation of instantaneous dipoles.  
London Dispersion forces