SCIENCE TEST

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1. State the relative charges of the subatomic particles

  • Protons:+1 Neutrons:0 Electron :-1
  • Protons:1 Neutrons:1 Electron :9
  • Protons:1 Neutrons:1 Electron :8
  • Protons:3 Neutrons:1 Electron :9
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2. How do you calculate the number of neutrons in an atom ?

  • atomic number - mass number
  • mass number -atomic number
  • atomic number /mass number
  • percentage x by atomic number

3. What is gamma radiation

  • A electromagnetic wave
  • A electroststic wave

4. metal carbonate +acid

  • salt+water +carbon dioxide
  • carbon monoxide

5. What is a reversible reaction ?

  • A reaction which can go from reactants to products but also from products to reactants
  • reaction that moves backwards
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