Naming Ionic (metal/nonmetal) binary compounds When a metal combines with a non-metal, The resulting compounds contains ions. To name these compounds you just have to name the ions. Group 1 metals will always give a positive one charge. The non-metal will always give a negative charge. Ionic binary compounds rules: 1.The cation (positive ion) is always named first and the anion (negative ion) second. 1.A simple cation takes its name from the name of the element. For example, K is called potassium in the names of compounds containing this ion. 3.A simple anion is named by taking the first part of the element name and adding the suffix “ ide”. So, the O ion is called oxide

Question: Name the following compound MgO These are the present ions: Mg 2+, O 2 -

Answer: Magnesium Oxide

Naming Ionic Compounds (with transition metals) These are the combinations of a group 3-12 metals and a non- metal Transition metals are ions that can form more than one type of cation. For example iron (Fe) can form a 2+ or 3+ ion, some other examples would be gold (Au), or chromium (Cr) So we would name these compounds by taking the roman numeral in parenthesis and that would be the charge of your metal. You would have to adjust the subscript # of your anion in order to match the charge of your metal Try this first example.

Question: Iron(III)chloride

Answer: FeCl 3 this is the answer because the iron had a positive 3 charge, However the chloride ion only had a 1 negative charge, we need 3 Of these to balance the charge of the ion. Try these next few on your own…

Question: Tin(IV)oxide

Answer: SnO 2 the tin had a 4+ charge and the oxide has a 2- charge so we need 2 of these to balance charges

Question: Silver(I)Nitrate

Answer: AgNO 3

Question: MnO 2

Answer: Manganese(II)oxide

Question: PbSO 4

Answer: Lead (II) Sulfate

Naming Covalent Compounds Covalent compounds consist of a non-metal on a non-metal Rules for naming these: 1. The first element in the formula is named first 2. The 2 nd element is named as it was the anion 3. Prefixes are used to denote the numbers of atoms present. 4. mono- is never used in front of first element.

Question: Name the following: BF 3

Answer: Boron triflouride

Question: CO

Answer: Carbon monoxide

Question: P4O6P4O6

Answer: Tetraphosphorus hexoxide

Dinitrogen trioxide

Answer: N2O3N2O3