Other questions in this quiz

2. the main compound of limestone is?

  • calcium carbonate
  • calcium hydroxide solution
  • calcium hydroxide
  • calcium oxide

3. name two sub-atomic particles in the nucleus of an atom

  • neutron and proton
  • proton and electron
  • neutron and electron

4. why is there no overall charge on an atom?

  • number of protons is equal to number of electrons
  • number of protons is equal to the number of neutrons
  • mass number can be divided by two

5. why is the extraction of copper expensive?

  • copper is very reactive
  • takes a lots of time
  • many steps are involved
  • its a batch process


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