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ARC-Easy / Mercury_401583 / A model of an atom includes red marbles for electrons, green marbles for…

Problem

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question

A model of an atom includes red marbles for electrons, green marbles for protons, and blue marbles for neutrons. All marbles have a radius of 2 cm. How could the model be changed to represent more properties of an atom?

choices

  • by using smaller marbles to represent electrons
  • by using two marbles to represent each neutron
  • by using two differently colored marbles for protons
  • by switching the colors of the marbles

Discussion

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Source and history

Official source

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