Chem notes 1-3 - 1.4-1.7 Sig Figs 0.004004500 4.50 Bolded are significant x or Same sig fig or same decimal places Density P = m/v Density times volume

1.4-1.7 Sig Figs: 0.00 4004500 4.50 Bolded are significant x or / Same sig fig + or – same decimal places Density P = m/v Density times volume = mass Extensive property: dependent on mass Intensive: independent of mass ex. Density Conversion kg to g then you multiply by 1000g/kg - Systematic error: built into instrument - Random Error: human error - Precision: how closely bundled are results - Accuracy: how close to real value 2.3-2.8 - Atomic number = proton number (z)BOTTOM - Mass number (a) = protons+neutrons TOP - Isotopes= massXabundance add it all up = periodic table number - Periodic table: ME transit into halogas LA -1 mole= 6.02*10 23 atoms aka Molar Mass 3.2-3.6 (3.5 not included) - Formula mass (ionic compounds) = Molecular mass (covalent) = mass of 1 mole - Be careful of units