Describe how to write a formula for a covalent compoundMethod to deduce the formulae of covalent compoundsNon-metals combine with non-metals to form covalent compounds. Table shows the number of electrons needed by an atom of a non-metal to achieve a sta…

How do you write the formula for ionic compounds?Method to deduce the formulae of ionic compounds:Metals from Groups 1, 2 and 13 combine with non-metals from Groups 15, 16 and 17 to form ionic compounds. Table shows how the metal atoms of Groups 1, 2 an…