Isotopes - different # neutrons
    ions - charged
    ionic - metal to nonmetal
    molecular  - all nonmetals
    conversions - cm -> in, etc
    prefixes - milli, micro, nano, etc
    Avogadro's Number - 6.02 x 1023 "parts"
    naming - CaS - cacium sulfide, etc
    formula - aluminum phosphate - AlPO4
    group - halogens, etc
    intensive/extensive properties - color, mass, etc
    density - d=m/v, etc
    pure substances
    mixtures
    period - levels, etc
    C-> K  K-> C
    solutions/dilutions
    moles from mass 
          or volume if gas
    oxidation numbers in formula  KMnO4 - K = +1, O = 
                                  2- so Mn must be 7+
    acids/bases 
    titration - m1v1 = m2v2
    stoichiometry - reaction balance
    empirical formula - example carbohydrates - CH2O
    % yield
    effusion - gas passing through pores
    PV = nRT  P - T  V - T  P - 1/V
    unpaired electrons
    quantum numbers - what's ok
    heat capacity - remember the unit is joules
    Q = m x c x delta-t
    Calculation delta-H from reactions - because you multiply by 
                     the number of moles, the mol unit goes away.
    electronegativity - F is most
    atomic radius
    specific heat - heat capacity divided by mass to get J/g C
    valence electrons - read the group number
    enthalpy of formation - formation is from elements so 
                            reactants always equal 0
    Lewis structure
    shape - tetrahedral - all angles and lengths the same, 
            triangular pyramid - not all same length sides
            triangluar planar - 3 bonds to central atom
    resonance - multiple possibilities for drawing because can't 
                prove bonds in one place.
    global warming - what wavelengths absorbed, what transmitted, etc
                   - effect of particles in air
    s, p, d, f - blocks of the periodic table