ELEMENTS 11-20, AND BEYOND

Atomic Number Name and Lewis Symbol Atomic Mass Number of Outer e Major Properties and Uses [Pg.105]

11 Sodium, Na 22.9898 1 Soft, chemically very reactive metal. Nuclei contain lip and 12 n [Pg.105]

12 Magnesium, Mg 24.312 2 Lightweight metal used in aircraft components, extension ladders, portable tools. Chemically very reactive. Three isotopes with 12, 13,14 n [Pg.105]

13 Aluminum, Ai 26.9815 3 Lightweight metal used in aircraft, automobiles, electrical transmission line. Chemically reactive, but forms self-protective coating [Pg.105]

14 Silicon, Si 28.086 4 Nonmetal, 2nd most abundant metal in Earth s crust. Rock constituent. Used in semiconductors [Pg.105]

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