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Boss quiz

10 questions on the whole topic. You get one try at each.

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  1. Which of these is a property of a typical metal?

    • It is brittle
    • It is dull
    • It is a good conductor of electricity
    • It is a poor conductor of heat

  2. What is a column of the periodic table called?

    • A block
    • A group
    • A period
    • A row

  3. Why did Mendeleev leave gaps in his periodic table?

    • To make the table easier to print
    • For elements that had not been discovered yet
    • To separate the solids from the gases
    • Because he did not know enough symbols

  4. Where are most of the non-metals in the periodic table?

    • On the right
    • Along the bottom
    • In the middle
    • On the left

  5. What are the elements in Group 1 called?

    • The alkali metals
    • The halogens
    • The noble gases
    • The transition metals

  6. Which gas is made when sodium reacts with water?

    • Chlorine
    • Hydrogen
    • Carbon dioxide
    • Oxygen

  7. How does the reactivity of the metals change as you go down Group 1?

    • It stays the same
    • It goes up, then down
    • It decreases
    • It increases

  8. Which group contains the halogens?

    • Group 0
    • Group 1
    • Group 2
    • Group 7

  9. The noble gases are described as inert. What does inert mean?

    • Very reactive
    • Coloured
    • Unreactive
    • Poisonous

  10. Going down a group, three elements melt at 181 °C, 98 °C and 63 °C. Which is the best estimate for the next element down?

    • 150 °C
    • 39 °C
    • 98 °C
    • 200 °C
Answers
  1. It is a good conductor of electricity. Metals are shiny, malleable and good conductors of electricity and heat.
  2. A group. Groups are columns. Periods are rows.
  3. For elements that had not been discovered yet. He predicted the properties of the missing elements. When they were found, they matched.
  4. On the right. Metals are on the left and in the middle. Non-metals are on the right.
  5. The alkali metals. They react with water to make alkalis.
  6. Hydrogen. sodium + water → sodium hydroxide + hydrogen
  7. It increases. Lithium fizzes steadily. Potassium, lower down, bursts into flame.
  8. Group 7. Fluorine, chlorine, bromine and iodine are the halogens, in Group 7.
  9. Unreactive. The noble gases hardly ever take part in a chemical reaction.
  10. 39 °C. The melting points fall as you go down the group, so the next one is below 63 °C.