usually composed oppositely charged metallic cations and nonmetallic anions that form ionic bonds + cations - anions

Na “gives” Cl one electron and now both atoms have a full valence shell (electron configuration of a noble gas)

Na 1+ + F 1-  NaF

shows the kinds and numbers of atoms in the lowest whole-number ratio of ions in the ionic compound Na 1+ + Cl 1-  NaCl Ca (Cl 1- )  CaCl 2 Mg 2+ + O 2-  MgO

Mg and N? it takes two nitrogens to combine with three magnesiums Mg 3 N 2 magnesium nitride

form crystal lattices at room temperature (repeating three dimensional patterns) the coordination number of a ion is the # of ions that surround an ion with the opposite charge

high melting points can conduct electric currents when melted or dissolved in water will shatter if impacted or crushed

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valence electrons are like a “sea of electrons that can drift freely bonds result from the attraction between these electrons and the positively charged metal ions

Therefore metals have the following characteristics….

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mixtures composed of two or more elements (at least one is a metal) properties superior to those of their component elements -stronger / harder -more lustrous -more conductive -more resistant to corrosion

Sterling Silver Cast Iron Stainless Steel ---- Bronze Ag (92.5%) Cu (7.5 %) Fe (96%) and C (4%) Fe (80.6 %), Cr (18%), C (0.4%), Ni (1%) Cu (86%) and Sn (14%)