| A | B |
|---|
| atom | basic building blocks of matter |
| chemical bonding | the combining of atoms of elements to form new substances |
| valence electron | the electrons in the outermost energy level of an atom |
| ionic bonding | chemical bonding that involves a transfer of electrons from one atom to another |
| ion | a charged atom |
| ionization | the process of removing electrons and forming ions |
| ionization energy | energy needed for ionization |
| electron affinity | tendency of an atom to attract electrons |
| crystal lattice | the placement of ions in an ionic compound results in a regular, repeating arrangement |
| covalent bonding | chemical bonding in which electrons are shared instead of transferred |
| electron-dot diagram | chemists represent the elctron sharing that takes place in a covalent bond by electron-dot diagram |
| diatomic element | covalent bonding often takes place between atoms of the same element |
| molecule | the combination of atoms formed by a covalent bond |
| network solid | covalently bonded solids that tend to have high melting points because the atoms of these large molecules constantly continue to bond to one another |
| polyatomic ion | a group of covalently bonded atoms that act like a single atom when combining with other atoms |
| metallic bond | when atoms of metals bond together |
| oxidation number | the number of electrons an atom gains, loses, or shares when it forms chemical bnds (it describes its combining capacity) |
