Unit b matter and chemical change notes(naming ionic compounds)
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The document provides steps for naming ionic compounds: 1) Determine if the substance is molecular or ionic. 2) Write the full name of the metal first. 3) Add the name of the non-metal second, dropping the "-ine" and replacing it with "-ide". 4) For metals not in groups 1 or 2, include the ionic charge of the metal in Roman numerals within brackets between the metal and non-metal names.
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Unit b matter and chemical change notes(naming ionic compounds)
- 2. Naming Ionic Compounds Step 1: Determine if the substance is a molecular or an ionic compound Example: NaCl (Metal & Non-metal) Step 2: Write the full name of the metal first Na = Sodium Step 3: Add the name of the non-metal second Cl = chlorine Step 4: Drop the ending of the non-metal, the “ine”, and change it to “ide” chlorine chloride NaCl = Sodium chloride
- 3. Naming Ionic Compounds ** Step 5. If the metal is not from group 1 or 2 (i.e.3-17) we may need to determine and state the ionic charge of the metal. For example SnO2. There are 2 Oxygen atoms and 1 tin atom. Each oxygen atom has a 2- charge (see common ion charges). That is 4- charges in total. There is only 1 tin atom and its charge must equal and balance the negatives. The tin must have a 4+ charge, one of its common ion charges (top right of the box).
- 4. Naming Ionic Compounds For example SnO2. Sn (charge +4) ----- O (charge -2)x2 Convert the ionic charge of the metal into a Roman numerals number. (4 is IV) Insert the Roman numeral between the metal and non metal using brackets Ex. Tin (IV) oxide
- 6. Simple Examples Try Yourself: CaO Calcium Oxide Sr3N2 Strontium Nitride BaBr2 Barium Bromide
- 8. Complex Examples Try Yourself: CrN Chromium (III) nitride Nb3P5 Niobium phosphide Mn2O7 Manganese (VII) oxide