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Chem Formulas/Terms
Chemistry Formulas and Terms
Term | Definition |
---|---|
Boyles Law | Inverse relationship between pressure and volume PV = PV |
Ideal Gas Law | PV = nRT |
Gay-Lussac's Law | Direct relationship between pressure and temperature in K P/T = P/T |
Charles' Law | Direct relationship between volume and temperature in K V/T = V/T |
Sig-Fig Rules | Mult/Div: count number, keep the fewest Add/Sub: line up at decimal Watch 0's |
Orbital Types | S (1), P (3), D (5), F (7) - 2 electrons in each orbital |
Sulfate | SO4 (2-) |
Nitrate | NO3 (-) |
Phosphate | PO4 (3-) |
Carbonate | CO3 (2-) |
Hydroxide | OH (-) |
Hydrocarbon ending in ane | single bond |
Hydrocarbon ending in ene | double bond |
Hydrocarbon ending in yne | triple bond |
Density Formula | D = m/V |
Types of Quarks | Up, Down (make up protons), Strange, Charm, Top, Bottom |
Specific Heat | q = mCT |
How to find oxidation numbers | determine the charge on an element, remembering that Oxygen is -2 and Hydrogen is +1 |
Major Groups on the periodic table | Alkali metals (Group 1), Alkaline Earth Metals (Group 2), Transition metals (Groups 3 - 13), Halogens (Group 17), Noble Gases (Group 18) |
Largest Electronegativity, Ionization Energy, smallest radius | Fluorine (top right) |
Smallest Electronegativity, Ionization Energy, Largest radius | Francium (bottom left) |
% Composition | % Comp = mass (element) / mass (compound) |
Molecular formula | MF = Empirical Formula * Ratio between the two |
Types of 3-D Shapes | Linear, Trig Planar, Tetrahedral (with no pairs of electrons), Trigonal Pyramidal, Bent (have extra pairs of electrons), Trigonal bipyramidal, octahedral (expanded octets) |
Finding mass of a compound | Add masses of elements in the compound |
Finding mass of a product or reactant | Multiply mass of compound by number of moles of the compound |
Increases the speed of a chemical reaction Decreases the speed of a chemical reaction | catalyst, inhibitor |
Combined Gas Law | PV/T = PV/T |
3 Types of Radiation | Alpha, Beta, Gamma |
Ionic Naming Rules | Balance charges, use subscripts, no prefixes, roman numerals for transition metals in naming |
Covalent Naming Rules | Use subscripts, use prefixes to identify how many of each type of atom |