Isotopes and atoms

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1. What is an isotope?

  • atoms of different elements with the same atomic number
  • atoms of the same element with different numbers of neutrons
  • atoms of the same element with different atomic numbers
  • atoms of different elements with the same number of neutrons
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2. How many protons would oxygen have?

  • 8
  • 16
  • 9
  • other

3. When an element is shown with a mass number and atomic number, which number is placed on top?

  • neither
  • a sum of both
  • mass
  • atomic

4. Which of the below has the lowest relative mass?

  • electron
  • proton
  • neutron
  • ion

5. If two isotopes, Oxygen-16 and oxygen-19 where presented, what would be the difference in mass number between them?

  • 4
  • 0
  • 3
  • 20
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