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u4lectout - Unit 4 The Periodic Table and Periodicity Name...

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Unit 4: The Periodic Table and Periodicity Name: ____________________ The Elements Element names come from a variety of sources. elements known to the ancients… Au, Ag, S, Sn, C place names… Fr, Po, Ge, Ga, In, Eu, Am, Cf, Sc famous people… Es, Fm, Md, No, Gd, Rf, Bh foreign languages… W, Fe, Au, Ag, Pb, Sn, K mythology-related names… Th, Pm, Ce, Ta, Ti, Pd, Ir names related to element properties… Xe Background on the Periodic Table Dmitri Mendeleev : given credit for Periodic Table (~1870) -- -- Henry Moseley : put elements in order of increasing atomic number Describing the Periodic Table periodic law : the properties of elements repeat every so often period : group (family) : Regions of the Table metals : left side of Table; form cations properties: nonmetals : right side of Table; form anions properties: metalloids (semimetals ): “stair” between metals and nonmetals properties: Si and Ge 1
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- alkali metals : alkaline earth metals : halogens : noble gases : lanthanides : actinides : coinage metals : transition elements : main block (representative ) elements
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