Other questions in this quiz

2. how many groups are there in the periodic table

  • 8
  • 6
  • 4
  • 10

3. what is inside an atoms nucleus

  • neutrons
  • electrons and protons
  • protons and neutrons
  • neutrons and electrons

4. what is the electonic configuration of oxygen

  • 2,5
  • 2,6
  • 1,6
  • 2,8

5. what does the symbol Na stand for oxygen

  • sodium
  • hydrogen
  • magnesium
  • oxygen

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