Ionic Compounds and Metals

Chemical bond

Force that holds two atoms together

Valence electrons

Electrons involved in bonding

Ionic bond

Formed through electron transfer (results in neutral compound)

Octet

Stability found with 8 valence electrons

Cations

Formed when one or more valence electron is lost, positively charged

Anions

Formed when one or more valence electrons are gained, negatively charged ion

Formula Unit

Chemical formula for ionic compound

Swap and drop method

Method used to simplify ionic compounds, take the number on top and switch it and then bring it down

Polyatomic ions

Made up of more than one atom with overall charge. Is polyatomic if is has 3 or more element symbols, parentheses, or ends in something other than ide

Naming

Cations- same name as element, use Roman numerals for transition metals

Anions- ending changes to ide when naming (oxygen- oxide)

Peroxides

Oxygen has minus one charge, elements in groups 1 and 2 can combine to form peroxides. K2O2 is potassium peroxide. PbO2 could not be lead peroxide because lead is not in groups 1 or two.