The Periodic Table, Molecules and Molecular Compounds, and Ions and Ionic Compounds (Sections)
For each of the following elements, write its chemical symbol, locate it in the periodic table, give its atomic number, and indicate whether it is a metal, metalloid, or non-metal: (a) chromium, (b) helium, (c) phosphorus, (d) zinc, (e) magnesium, (f) bromine, (g) arsenic.
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