Ionic Compounds Formed from positive and negative ions. Almost always have a metal and a nonmetal.
Ionic Compounds Exist mostly as crystalline solids. Conduct electricity when melted or dissolved in water. [
Ionic Compound Names Example: NaCl Sodium Chloride When naming the compounds always list the positive ion first (metal) and end then nonmetal in – ide.
Ionic Compound Names Example: MgBr 2 Magnesium Bromide Example: Al 2 O 3 Aluminum Oxide
Ionic Compound Formulas Example: Aluminum Bromide AlBr 3 When writing formulas, place the positive ion first (metal!) and balancing the charges to make a neutral compound. Example: Magnesium Chloride
Ionic Compound Formulas Mg +2 and Cl -1 Cl -1 Final Formula: MgCl 2 [
Ionic Compound Formulas Example: Sodium Oxide Na 2 O Example: Calcium Sulfide CaS
Transition Metal Ions [
Transition Metal Ions
Example: Iron (III) Chloride The roman numeral gives you the charge of the metal! Fe +3 and Cl –1 FeCl 3 Example: Copper (II) Oxide CuO
Transition Metal Ions Example: CoBr 2 When writing the name, you must find the charge of the metal! Bromine is normally Br -1, so Cobalt must be Co +2 Cobalt (II) Bromide
Polyatomic Ions Ions that have more than one atom, and always are found as a group. [
Polyatomic Ions Example: Calcium Hydroxide Ca +2 and OH -1 Ca(OH) 2 Example: Magnesium Phosphate Mg +2 and PO 4 -3 Mg 3 (PO 4 ) 2