ChemistryCode 5070
Formulae
What this topic asks you to be able to do
- Give the formula of any element or compound that the subject content mentions by name
- Define a compound's molecular formula as the kinds of atom in one of its molecules and how many there are of each
- Define a compound's empirical formula as the formula that gives its different atoms or ions in their simplest whole number ratio
- Deduce a simple compound's formula from a model or diagram of it, using the relative numbers of its atoms or ions
- Deduce an ionic compound's formula, working from the charges its ions carry
- Construct word, symbol and ionic equations showing how reactants give rise to products, including state symbols
- Deduce, from the relevant information you are given, the symbol equation for a chemical reaction, showing state symbols