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Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Section

Predicting the properties of francium

19 practice questions

Start practising (8 questions)

Practice questions

1–8 of 8 · Easy

  1. Question 1

    1 mark · Easy

    State the symbol of francium.

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  2. Question 2

    3 marks · Easy

    Francium is below caesium in Group 1 of the Periodic Table.

    (a)

    State whether francium is expected to be hard or soft.

    [1 mark]
    (b)

    State if francium is expected to react faster or slower with water compared to caesium.

    [1 mark]
    (c)

    State the colour francium is predicted to be when freshly cut.

    [1 mark]
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  3. Question 3

    2 marks · Easy

    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.

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  4. Question 4

    2 marks · Easy

    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.

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  5. Question 5

    3 marks · Easy

    Table 1 shows the melting points of some alkali metals.

    Table 1: Melting points of alkali metals
    ElementMelting point / °C
    Lithium180.5
    Sodium97.8
    Potassium63.5
    Rubidium39.3
    Caesium28.5
    (a)

    Describe the trend in melting points as you go down Group 1.

    [1 mark]
    (b)

    Use the trend to estimate the melting point of francium.

    [1 mark]
    (c)

    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?

    [1 mark]
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  6. Question 6

    3 marks · Easy

    Francium is expected to react rapidly when exposed to air or water.

    (a)

    State what would happen to francium's shiny surface if a small piece was exposed to air.

    [1 mark]
    (b)

    Predict one observation you would expect if francium was added to water.

    [1 mark]
    (c)

    Name the gas produced in the reaction between francium and water.

    [1 mark]
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  7. Question 7

    2 marks · Easy

    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.

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  8. Question 8

    1 mark · Easy

    State one physical property that francium is predicted to have, based on trends in Group 1 of the Periodic Table.

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