periodic table - chart of the elements arranged in rows and columns, group - a column in the periodic table , periods - rows in the periodic table, metal - element that is generally shiny, pulled into wires, conducts electricity and thermal energy, luster - the ability of a metal to reflect light, ductility - the ability to be pulled into thin wies, malleability - the ability of a substance to be hammered into sheets, alkalai metals - elements in group 1, extremely reactive, alkaline earth metals - elements in group 2 of the periodic table, transition elements - elements in groups 3-12 on the periodic table, nonmetal - elements that have no metallic properties, halogen - elements in group 17 on the periodic table; very reactive, noble gases - elements in group 18; only react under special circumstances; very stable, semiconductors - conduct electricity at high temperatures but not at low temperatures,

Chapter 10 - Periodic table

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