| A | B |
|---|
| periodic table | arrangement of elements in order of thier atomic # so that elements with similar proerties fall in same column |
| periodic law | physical and chemical properties of the elements are periodic functions of atomic #'s |
| atomic radius | 1/2 distance from nucleus of identical atoms bonded together |
| ion | atom or group of bonded atoms |
| ionization | process of forming an atom |
| ionization energy | energy required to remove one electron from a neutral atom |
| /\> | ionization energy |
| electron affinity | energy change that occurs when an electron is aquired by a neutral atom |
| \/< | electron affinity |
| cation | positive ion |
| anion | negative ion |
| \/< | ionic radiii |
| valence electrons | availible to be lost or gained |
| electronegative | measure of an atom in a chem. compound to attract electrons |
| /\> | electronegativity |
| chemical bond | mutual electrical attraction between nuclei and valence electrons that binds the atoms together |
| ionic bonding | chemical bonding thta results from electrical attraction between large #'s of cations and anions |
| covalent bonding | sharing of electron pairs between 2 atoms |
| polar | uneven distribution of charge |
| molecule | neutral group of covalently bonded atoms |
| diatomic molecule | molecule containing 2 atoms |
| bond length | energy required to break a chemical bond and form neutrals isolated atoms |
| octet rule | chemical compounds want and octed of electrons in its outer layer |
| resonance | bonding in molecules on ions that can't be correctly represented by a single lewis structure |
| ionic compound | equal #'s of (+) and (-) charges |
| formula unit | simplest collection of atoms from which an ionic compound's formula can be established |
| lattice energy | energy released when one mole of a ionic crystalline compound is formed from gaseous ions |
| polyatomic ion | charged group of covalently bonded atoms |
| metallic bonding | chemical bonding thta results from attraction between metal atoms and surrounding sea of electrons |
| molecular polarity | uneven distribution of molecular charge |
| VSPER | repulsion between sets of valence- level electrons surrounding an atom causes these sets to be oriented as far apart as posible |
| dipole | created by equal but opposite charges that are separated by a short distance |
| AX2 | linear, 180, symmetric |
| AX3 | planar tri, 120, symetric |
| AX4 | tetrahedral, 109.5, symetric |
| AX3E | trigonal, 107, asym |
| AX2E2 | bent angular, 104.5, asym |
