A technician needs to write the chemical formula on a bottle of calcium chloride.
Which formula should the technician write on the bottle?
CaCl2\text{CaCl}_2CaCl2
CCl2\text{CCl}_2CCl2
Ca2Cl\text{Ca}_2\text{Cl}Ca2Cl
CaCl\text{CaCl}CaCl
93 exam-style questions on AQA GCSE Chemistry 1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes, covering 1.1.1a Atoms, elements and compounds, 1.1.1b Half equations and ionic equations, 1.1.2 Mixtures, 1.1.3 The development of the model of the atom (common content with physics), 1.1.4 Relative electrical charges of subatomic particles, 1.1.5 Size and mass of atoms, 1.1.6 Relative atomic mass, and 1.1.7 Electronic structure. Each one has a worked solution and a mark scheme showing where the marks go.