Which is the correct formula for calcium chloride?
CaCl2\mathrm{CaCl_{2}}CaCl2
Ca2Cl\mathrm{Ca_{2}Cl}Ca2Cl
CaCl\mathrm{CaCl}CaCl
Ca2Cl2\mathrm{Ca_{2}Cl_{2}}Ca2Cl2
230 exam-style questions on Edexcel GCSE Chemistry 1.1 Formulae, equations and hazards, covering 1.1.1 Formulae, word and balanced equations, 1.1.2 Balanced ionic equations, and 1.1.3 Hazard symbols and risk in practical work. Each one has a worked solution and a mark scheme showing where the marks go.