Quick answer: Group 1 metals have one outer electron and become more reactive down the group, reacting with water to make hydrogen and an alkaline hydroxide. This Chemistry 9-10 test on periodic table groups has 8 questions worth 20 marks, to do in 45 minutes: potassium in water, equation for potassium and halogens in appearance. The mark scheme is on a separate page; free printable PDF.
This chemistry grades 9-10 test on periodic table groups test works like a real class test. The mark scheme is on a separate page, so revise with the lesson first.
This test covers the alkali metals, the halogens and the noble gases. Write balanced equations with state symbols where asked, show your working in calculations, and answer explain questions in complete sentences.
Level: Chemistry grades 9-10 (GCSE · IGCSE · O Level · Class 9-10) · Curriculum: GCSE C1, IGCSE 9
Periodic table groups test: the test questions
Question 1 Potassium in water (3 marks)
Describe three observations when a small piece of potassium is added to water. (3 marks)Question 2 Equation for potassium (3 marks)
Write the balanced equation, with state symbols, for potassium and water. State the pH of the final solution. (3 marks)Question 3 Halogens in appearance (2 marks)
State the colour and physical state of chlorine and of iodine at 25 °C. (2 marks)Question 4 Bromine and sodium iodide (3 marks)
Bromine water is added to sodium iodide solution.- State what you would see. (1 mark)
- Write a balanced equation. (1 mark)
- Explain why this reaction happens. (1 mark)
Question 5 Noble gases (2 marks)
Explain why argon is unreactive and give one use of argon. (2 marks)Question 6 Alkali metal trend (3 marks)
Explain why caesium is more reactive than lithium. (3 marks)Question 7 Mass of sodium bromide (2 marks)
Chlorine reacts with sodium bromide: Cl₂ + 2NaBr → 2NaCl + Br₂. Calculate the mass of sodium bromide (relative formula mass 103) that reacts completely with 0.0500 mol of chlorine. (2 marks)Question 8 Halogen atoms (2 marks)
Use the diagram below to explain why chlorine is more reactive than bromine. (2 marks)
