Periods: rows, left to right (horizontal), elements have same number of energy levels, 7, Groups: columns, up and down (vertical), elements have same number of valence electrons, 18, Metals: Shiny (luster), Malleable (bend), Good conductors, Located on the left side of the Periodic Table, Nonmetals: Dull (no luster), Brittle (break), Bad conductors (insulators), Located on the right side of the Periodic Table, Metalloids: similar physical and chemical properties of metals and nonmetals, also called semiconductors, Located in the staircase, shiny like metals but brittle like nonmetals,

Qualities of the Periodic Table

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