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6. Who described atoms as different spheres that make up different elements

  • John Dalton
  • Democritus
  • J J Thompson
  • Ernest Rutherford

7. How were elements ordered before the periodic table?

  • By proton number
  • By relative atomic mass
  • By atom numbers
  • By weight

8. Who proposed that electrons orbit the nucleus in fixed shells?

  • Ernest Rutherford
  • Ernest Marsdon
  • Niels Bohr
  • J J Thompson

9. What did the gold foil experiment descover?

  • That an atom was mainly empty space with a nucleus in the centre and an electron orbiting it
  • Neutrons
  • That everything was made up of tiny particles
  • Electrons and made the plum pudding model

10. What is Filtration?

  • Splitting atoms
  • Separating different dyes in an ink
  • Separating a solid from a liquid
  • Separating liquids

11. What are the properties of alkali metals (Group 1)?

  • Not reactive
  • Soft and low-density. Decreases in reactivity and melting and boiling points as it goes down
  • Hard and high boiling and melting points increasing

12. What is the charge of an electron?

  • Negative
  • Posotive

13. What is an isotope?

  • Element with different number of neutrons
  • Element with different number of protons
  • Element with different amount on electrons
  • A combination of elements

14. What are the properties of Noble gases (Group 8)

  • Not reactive and boiling points increase as you go down
  • Soft and low-density. Decreases in reactivity and melting and boiling points as it goes down
  • Hard and high boiling and melting points increasing
  • Transition metals

15. What is Distillation?

  • Separating different dyes in an ink
  • Separating a solid from a liquid
  • Separating liquids
  • Separating different dyes in an ink

16. Who discovered the neutron?

  • Niels Bohr
  • James Chadwick
  • Democritus
  • Ernest Marsdon

17. What is the Mass number?

  • No. of electrons + No. of neutrons
  • No. of protons + No. of neutrons
  • No. of protons + No. of electrons

18. What is the electron configuration?

  • 2, 2, 2, 2...
  • 8, 8, 8, 8...
  • 2, 8, 8, 8...
  • 2, 2, 8, 8...