Sodium is an element. It is a solid at room temperature.
Solid sodium cannot be compressed. Why?
Solid sodium cannot flow, but liquid sodium can flow. Explain why.
Sodium gas completely fills any container it is put in. Explain why.
Sodium reacts with water. Sodium hydroxide, NaOH\text{NaOH}NaOH, and hydrogen, H2\text{H}_2H2, are made. Write a balanced symbol equation for this reaction.
Sodium sulfate has the formula Na2SO4\text{Na}_2\text{SO}_4Na2SO4. Calculate the relative formula mass of sodium sulfate. (Use relative atomic masses: Na=23.0\text{Na} = 23.0Na=23.0, S=32.1\text{S} = 32.1S=32.1, O=16.0\text{O} = 16.0O=16.0).
27 exam-style questions on OCR GCSE Chemistry The particle model. Each one has a worked solution and a mark scheme showing where the marks go.