Topic 8 Practice Paper: The Periodic Table — question paper

Section A: Multiple-choice questions[10 marks]

Choose one answer for each question. Each question is worth 1 mark.

1. 1

   An element in Group VII and period 3 of the Periodic Table is

   1. Afluorine
   2. Bchlorine
   3. Cbromine
   4. Dsulfur
   ( )
2. 2

   Moving from sodium to argon across period 3, the metallic character of the elements

   1. Aincreases steadily
   2. Bstays constant
   3. Cincreases then decreases
   4. Ddecreases
   ( )
3. 3

   Which ion is formed by an atom of aluminium (configuration 2,8,3)?

   1. AAl³⁺
   2. BAl⁺
   3. CAl³⁻
   4. DAl²⁻
   ( )
4. 4

   What happens to the melting point of the elements going down Group I?

   1. AIt rises
   2. BIt stays the same
   3. CIt falls
   4. DIt falls then rises
   ( )
5. 5

   Sodium is stored under oil in the laboratory because it

   1. Areacts with oxygen and water vapour in the air
   2. Bdissolves in the oil
   3. Cis less dense than the oil
   4. Dmelts if exposed to light
   ( )
6. 6

   Which row gives the correct appearance of each halogen at room temperature?

   1. Achlorine: pale yellow-green gas; bromine: red-brown gas; iodine: grey-black solid
   2. Bchlorine: colourless gas; bromine: red-brown liquid; iodine: purple vapour
   3. Cchlorine: pale yellow-green gas; bromine: red-brown liquid; iodine: grey-black solid
   4. Dchlorine: yellow-green liquid; bromine: red-brown gas; iodine: grey-black liquid
   ( )
7. 7

   Aqueous bromine is shaken with aqueous potassium chloride. What is observed?

   1. AThe orange-brown colour fades as chlorine is displaced
   2. BThe solution turns colourless and a gas is released
   3. CChlorine is displaced and the colour darkens
   4. DNo displacement occurs and the mixture stays orange-brown
   ( )
8. 8

   Which set of properties is characteristic of a transition element such as chromium?

   1. AHigh density, high melting point, coloured compounds
   2. BLow density, soft, floats on water
   3. CDull, brittle and a poor conductor
   4. DMonatomic and unreactive
   ( )
9. 9

   Iron is used in the Haber process because it

   1. Araises the temperature of the reactants
   2. Bincreases the pressure of the gases
   3. Cspeeds up the reaction without being used up
   4. Dreacts with nitrogen to form ammonia directly
   ( )
10. 10

    The electronic configuration of argon is 2,8,8. How many electrons are in its outer shell?

    1. A2
    2. B8
    3. C7
    4. D18
    ( )

Section B: Structured questions[20 marks]

Answer all questions in the spaces provided.

1. 11

   A student reacts equal-sized pieces of three Group I metals with cold water and records how vigorous each reaction is.

   1. (a)

      Arrange lithium, potassium and sodium in order of increasing reactivity with water.

      [1]
   2. (b)

      Describe two observations for the most reactive of the three metals.

      [2]
   3. (c)

      Rubidium sits below potassium in Group I. Predict one property of rubidium and justify your prediction.

      [2]
2. 12

   Three halogens are tested by adding aqueous chlorine, aqueous bromine and aqueous iodine separately to aqueous potassium bromide.

   1. (a)

      State what is observed when aqueous chlorine is added to the potassium bromide solution.

      [1]
   2. (b)

      State what is observed when aqueous iodine is added to the potassium bromide solution.

      [1]
   3. (c)

      Construct the balanced ionic equation, including state symbols where appropriate, for the change observed in part (a).

      [2]
   4. (d)

      Identify the oxidising agent in this reaction and explain your choice.

      [1]
3. 13

   Element X has the electronic configuration 2,8,8,1 and reacts vigorously with cold water.

   1. (a)

      Give the group of the Periodic Table that contains element X.

      [1]
   2. (b)

      Give the period that contains element X.

      [1]
   3. (c)

      Write the electronic configuration of the ion X⁺.

      [1]
   4. (d)

      Name a noble gas that has the same electronic configuration as X⁺.

      [1]
4. 14

   The transition elements are used widely in construction, industry and the chemical process business.

   1. (a)

      State two typical physical properties of transition elements.

      [2]
   2. (b)

      Give the oxidation number of iron in each of the two oxides FeO and Fe₂O₃, and name the compounds using Roman numerals.

      [2]
   3. (c)

      Name the transition element that catalyses the conversion of sulfur dioxide to sulfur trioxide in the Contact process.

      [1]
   4. (d)

      Argon is used to fill filament lamps. Explain why this unreactive gas suits this use.

      [1]