| 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 bond | a mutual electrical attraction between nuclei and valence electrons of different atoms that bond the atoms together |
| chemical formula | indicates the relative numbers of atoms of each kind in a chemical compound by using symbols and numerical subscripts |
| covalent bonding | sharing of electrons by atoms that bonds them together |
| diatomic molecule | a molecule containing only two atoms |
| double bond | a covalent bond produced by the sharing of two pairs of electrons between two atoms |
| electron dot notation | an electron configuration notation in which only the valence electrons of an atom of a particular element are shown indicated by dots placed around the elements symbol |
| formula unit | simplest ratio of ions present in an ionic compound |
| ionic bonding | chemical bonding that results from the electrical attraction between large numbers of cations and anions |
| ionic compound | combinations of ions that balance the postive and negative charge |
| lattice energy | energy released when one mole of an ionic crystalline compound is formed from gaseous ions |
| Lewis structures | formulas in which atomic symbols represent nuclei and inner shell electrons, dot pairs or dashes between two atomic symbols represent electron pairs in covalen bonds, and dots adjacent to only one atomic symbol represent unshared electrons |
| lone pair | unshared pair of electrons that belongs exclusively to one atom |
| molecular compound | a chemical compound whose simplest units are molecules |
| molecule | a neutral group of atoms that are held together by covalent bonds |
| multiple bonds | double and triple bonds |
| 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 |
| polar | describes an uneven distribution of charge |
| polar-covalent bond | bonded atoms that have an unequal attraction for shared electron |
| polyatomic ion | charged group of covalently bonded atoms |
| resonance | bonding in ions or molecules that can not correctly be 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 | indicates the kind, number, arrangement and bonds buy not the unshared pairs of the atoms in a molecule |
| triple bond | a covalent bond produced by the sharing of three pairs or electrons between two atoms |
| unshared pair | also called a lone pair, is a pair of electrons that is not involved in bonding and that belongs exclusively to one atom |
| molecular formula | shows types and numbers of atoms in a particular molecule of a compound |
