Chapter 2 Practice Paper: Patterns in the Periodic Table — question paper

Section A: Multiple-choice questions[10 marks]

Choose the one correct answer for each question.

1. 1

   Down Group 1, the alkali metals become more reactive because the outer electron

   1. Agets closer to the nucleus
   2. Bis held more tightly
   3. Cgets further from the nucleus and is lost more easily
   4. Dmoves into an inner shell
   ( )
2. 2

   Chlorine water is shaken with aqueous potassium iodide. The solution turns red-brown because

   1. Achlorine is less reactive than iodine
   2. Biodine is displaced by the more reactive chlorine
   3. Cpotassium iodide dissolves faster
   4. Dpotassium chloride precipitates
   ( )
3. 3

   A metal reacts vigorously with cold water. Which metals could it be?

   1. Azinc or iron
   2. Bcopper or silver
   3. Clead or magnesium
   4. Dpotassium or sodium
   ( )
4. 4

   Which statement about the noble gases is correct?

   1. Athey react with dilute acids
   2. Bthey exist as diatomic molecules
   3. Cthey have full outer shells and are unreactive
   4. Dthey have seven valence electrons
   ( )
5. 5

   Rusting of iron requires

   1. Aboth oxygen and water
   2. Boxygen only
   3. Cwater only
   4. Dcarbon dioxide and water
   ( )

Section B: Structured questions[20 marks]

Answer all questions in the spaces provided. Show all necessary working. Give numerical answers to 3 significant figures where appropriate, with units.

1. 1

   Part of the Periodic Table is described by three elements: F has configuration 2.8.1, G has 2.8.7, H has 2.8.8.

   1. (a)

      State the period and group of each element.

      [3]
   2. (b)

      Explain why F and the element above it in its group have similar chemical properties.

      [1]
   3. (c)

      Name the class (metallic or non-metallic) of F and of G, and relate each to its valence electrons.

      [2]
2. 2

   A student adds chlorine water to two salt solutions, A (potassium bromide) and B (potassium chloride).

   1. (a)

      State the observation for solution A and write the balanced equation.

      [3]
   2. (b)

      State the observation for solution B and explain it using the Group 17 trend.

      [2]
   3. (c)

      Write the reactivity order of chlorine, bromine and iodine produced by these experiments.

      [1]
3. 3

   Metals P, Q, R and S are tested. P fizzes vigorously with dilute hydrochloric acid. Q reacts with steam but not with cold water. R fizzes slowly in warm dilute hydrochloric acid. S shows no reaction with dilute hydrochloric acid.

   1. (a)

      State which of P, Q, R, S are above hydrogen in the reactivity series.

      [1]
   2. (b)

      Identify S as copper or silver from the syllabus list, or state that either is possible, with a reason.

      [2]
   3. (c)

      Arrange P, Q and R in decreasing reactivity, giving the evidence for your order.

      [2]
4. 4

   A garden shed has an iron roof. Some areas are painted; a scratched area shows red-brown rust.

   1. (a)

      State the two substances that reacted with the iron to form the rust.

      [1]
   2. (b)

      Explain why the painted areas have not rusted.

      [1]
   3. (c)

      Name one other barrier method for protecting iron, and state what happens where the paint has chipped.

      [1]