Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section
Predicting the properties of francium
19 practice questions
Practice questions
1–10 of 19
Question 1
1 mark · Easy
Answer and see the solution →State the symbol of francium.
Question 2
3 marks · Easy
Answer and see the solution →Francium is below caesium in Group 1 of the Periodic Table.
(a)[1 mark]State whether francium is expected to be hard or soft.
(b)[1 mark]State if francium is expected to react faster or slower with water compared to caesium.
(c)[1 mark]State the colour francium is predicted to be when freshly cut.
Question 3
2 marks · Easy
Answer and see the solution →The density of caesium is 1.87 g/cm³. Based on the trend in Group 1, predict the approximate density of francium. Give your answer to one decimal place.
Question 4
2 marks · Easy
Answer and see the solution →Francium is predicted to react very violently with water. Explain using trends in Group 1 why francium is expected to be even more reactive than caesium.
Question 5
3 marks · Easy
Answer and see the solution →Table 1 shows the melting points of some alkali metals.
Table 1: Melting points of alkali metals Element Melting point / °C Lithium 180.5 Sodium 97.8 Potassium 63.5 Rubidium 39.3 Caesium 28.5 (a)[1 mark]Describe the trend in melting points as you go down Group 1.
(b)[1 mark]Use the trend to estimate the melting point of francium.
(c)[1 mark]Francium's predicted melting point is below room temperature in a warm country. What state (solid, liquid or gas) might it be in during a hot day?
Question 6
3 marks · Easy
Answer and see the solution →Francium is expected to react rapidly when exposed to air or water.
(a)[1 mark]State what would happen to francium's shiny surface if a small piece was exposed to air.
(b)[1 mark]Predict one observation you would expect if francium was added to water.
(c)[1 mark]Name the gas produced in the reaction between francium and water.
Question 7
2 marks · Easy
Answer and see the solution →Room temperature is about 25°C. If francium has a melting point of 22°C, what state (solid or liquid) would you expect francium to be in at room temperature? Explain your answer with a calculation.
Question 8
1 mark · Easy
Answer and see the solution →State one physical property that francium is predicted to have, based on trends in Group 1 of the Periodic Table.
Question 9
2 marks · Normal
Answer and see the solution →State two physical properties you would expect francium to have, based on its position in Group 1 of the Periodic Table.
Question 10
4 marks · Normal
Answer and see the solution →Francium has never been seen, but chemists can predict its properties using trends in Group 1. Answer the following about francium.
(a)[1 mark]State the formula of the hydroxide formed when francium reacts with water.
(b)[2 marks]Describe what you would observe when a piece of francium is added to water.
(c)[1 mark]Explain why francium reacts more violently with water than potassium.