Groups - Number of valence electrons, Periods - Number of electron shells, Protons - Positively charged particles, Neutrons - Neutrally charged particles, Electrons - Negatively charged particles, Atomic number - Number of protons in an atom, Noble Gases - Group 8 - extremely stable, Alkali Metals - Group 1 - extremely reactive, Electron configuration - How electrons are arranged, Metals - Shiny, high melting point, malleable, good conductor, Non-metals - Dull, low melting point, brittle, poor conductor,

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