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Combined science (Foundation)
Groups of the periodic table

Starter quiz

  • Match the keyword to the correct statement.
    • salts
      ⇔
      Ionic compounds formed from positive and negative ions. ✓
    • halide
      ⇔
      A salt formed from a halogen. ✓
    • diatomic elements
      ⇔
      Two atoms of the same type chemically bonded together. ✓
    • Group 7
      ⇔
      Non metallic elements which react with metals to form halide salts. ✓
  • Which trends occur in Group 7 elements going down the group?
    • melting points decrease
    • melting points increase  ✓
    • boiling points increase  ✓
    • boiling points decrease
    • size of atoms and molecules decrease
  • What happens to the forces of attraction between atoms going down Group 7?
    • they become stronger  ✓
    • they become weaker
    • they stay the same
  • Going down Group 7, the molecules become more ______ packed together and density increases.
    • 'tightly' ✓
  • Place the halogens in order of their density at room temperature. Place the least dense halogen first.
    • 1
      ⇔
      fluorine
    • 2
      ⇔
      chlorine
    • 3
      ⇔
      bromine
    • 4
      ⇔
      iodine
    • 5
      ⇔
      astatine
  • Which statement explains why reactivity decreases down Group 7?
    • It becomes more difficult to gain an electron as the size of the atom increases.  ✓
    • It becomes easier to gain an electron as the size of the atom increases.
    • The distance of the outer electron from the nucleus decreases.
    • The distance of the outer electron from the nucleus increases.  ✓
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