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Questions 2.4

  1. Noble gases exist as single atoms (mono-atomic molecules). Explain this.
  2. Although stable and unreactive some noble gases can be made to react under extreme conditions, such as high temperatures. Which of the elements would be the most difficult to be made to react? Explain your answer.


Answers to Questions 2.4

  1. Atoms of noble gases have complete energy levels; so they are stable and do not chemically combine with other atoms.
  2. Helium. It has the smallest atomic radius; so its electrons and the most strongly held together, with the least tendency to lose or share.