| A | B |
|---|
| bond energy | the energy required to break a chemical bond and form neutral isolated atoms |
| bond length | the distance between two bonded atoms at their minimum potential energy, that is, the average distance between two bonded atoms |
| chemical formula | a formula that indicates the relative numbers of atoms of each kind in a chemical compound by using atomic symbols and numerical subscripts |
| covalent bonding | a chemical bond resulting from the sharing of an electron pair between two atoms |
| diatomic molecule | a molecule containing only two atoms |
| ionic bonding | the chemical bond resulting from electrical attraction between large numbers of cations and anions |
| ionic compound | a compound composed of positive and negative ions that are combined so that the numbers of positive and negative charges are equal |
| Lewis structure | a formula in which atomic symbols represent nuclei and innershell electrons, dot-pairs or dashes between two atomic symbols represent electron pairs in covalent bonds, and dots adjacent to only one atomic symbol represent unshared electrons |
| lone pair | a pair of electrons that is not involved in bonding and that belongs exclusively to one atom |
| metallic bonding | chemical bonding that results from the attraction between metal atoms and the surrounding sea of electrons |
| molecular compound | a chemical compound whose simplest units are molecules |
| molecular formula | a formula showing the types and numbers of atoms combined in a single molecule of a molecular compound |
| molecule | a neutral group of atoms that are held together by covalent bonds |
| multiple bond | a double or triple bond |
| nonpolar-covalent bond | a covalent bond in which the bonding electrons are shared equally by the bonded atoms, resulting in a balanced distribution of electrical charge |
| octet rule | chemical compounds tend to form so that each atom, by gaining, losing, or sharing electrons, has an octet of electrons in its highest occupied energy level |
| resonance | the bonding in molecules or ions that cannot be correctly represented by a single Lewis structure |
| single bond | a covalent bond produced by the sharing of one pair of electrons between two atoms |
| structural formula | a formula that indicates the kind, number, arrangement, and bonds but not the unshared electron pairs of the atoms in a molecule |
| unshared pair | a pair of electrons that is not involved in bonding and that belongs exclusively to one atom |
| VSEPR theory | repulsion between the sets of valence-level electrons surrounding an atom causes these sets to be oriented as far apart as possible |
