Distinguish between ionic and covalent compounds under the following properties: (a) Strength of forces between constituent elements (b) Solubility of compounds in water (c) Electrical conduction in substances (ii) Explain how the following metals are obtained from their compounds by the reduction process: (a) Metal M which is in the middle of ... An ionic formula • consists of positively and negatively charged ions. • is neutral. • has charge balance. total positive charge = total negative charge The symbol of the metal is written first followed by the symbol of the nonmetal. Binary Ionic Compounds Type (I)
When metal and nonmetal ions form ionic bonds, their total electrical charges must balance each other exactly (as in, add up to zero). In order to write a correct formula, you must know the ion charges of all the atoms involved. This is where your table of elements comes in very handy—to find the ion charges of each element.