C1a

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  • Created by: ErinFran
  • Created on: 18-05-16 16:23

1. Why are alloys stronger and harder than pure metals?

  • The added metal is harder than the original metal.
  • The atoms are now bigger so there is less room to move.
  • Different sized atoms disrupt the regular arrangement of atoms and so the layers cannot slide over each other.
  • Different types of free electrons repel each other and so keep the metal in a certain shape.
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Other questions in this quiz

2. In an ion, the number of electrons equals the number of protons

  • False
  • True

3. Which of these chemical symbols is incorrect?

  • Osmium - Os
  • Tungsten - Tg
  • Potassium - K
  • Silver - Ag

4. What method is used to separate crude oil?

  • Fractional distillation
  • Hydration
  • Cracking
  • Thermal decomposition

5. What does limestone thermally decompose to form?

  • Calcium dioxide and carbon dioxide
  • Calcium oxide and carbon dioxide
  • Calcium dioxide and carbon monoxide
  • Calcium oxide and water

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