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The Atom & Periodic Table of Elements Test – Study Guide. Study and understand the following: Atomic Structure: How to find an element’s: atomic number atomic mass what two particles make up the atomic mass? what makes up the atom’s volume? # of protons Electrical charge of proton, electron, neutron # of electrons # of neutrons group # & family name # of valance electrons What are valance electrons? Periodic Table: Characteristics of each family Reactivity – generally elements get less reactive as you travel from left to right – except for Grp. # 18 Properties of Metals & Non-metals Location of non-metals & metals Information the group # & period # gives us Compounds: Definition What families like to bond with each other to form compounds? Counting atoms in a chemical formula Draw Bohr’s Model and Lewis Dot Diagram for an atom See next page…. Use NEON for this DIAGRAM: Periodic Square Lewis Dot Diagram BOHR’s Model P n Use SULFUR for this DIAGRAM: Periodic Square Lewis Dot Diagram BOHR Model P n