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 What is chemistry?  What is matter?  Physical vs. Chemical Properties o Identify Properties and classify them as physical or chemical  Density – Definition, Formula, GRASS calculations  Atomic Theories o Scientists and Models  Atoms o Subatomic particles o Standard Atomic Notation o Calculating the number of p+, e-, n0  Bohr-Rutherford Diagrams (for the first 20 elements)  Navigating the Period Table o Metals, non-metals, metalloids (incl. Properties) o Periods and groups (incl. Properties)  Chemical Families on the Periodic Table (Gp. 1, 2, 17, 18)  Distinguish between atom, element & compound  Relationship between number of valence electrons and number of bonds  Gas Lab – How to identify a gas and observations