Chemical Nomenclature Review Chemical Formulas Identify a compound. Use subscripts to tell how many of each element. Subscript outside of ( ) distributes only to the elements inside of the ( ). Ions Are charged particles: protons ? electrons Types of Ions Cations (metals) positive charge after LOSING electron(s) Anions (nonmetals) negative charge after GAINING electron(s). Monotomic: formed from a single atom. Polyatomic: formed from more than one type of atom. Ions ATOM Chlorine Bromine Sulfur Oxygen Iodine ION Chloride Bromide Sulfide Oxide Iodide Types of Nomenclature Based on First Element!!! Type I: Metal / Non-metal Type II: Transition Metal / Non-metal Type III: Non-metal / Non-metal Example - Metal is from Groups 1, 2 or 13 Type 1