Noble gases by atomic number

The exercise was created 2021-03-17 by Enimya. Question count: 7.




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All None

  • 2 helium
  • 10 neon
  • 18 argon
  • 36 krypton
  • 54 xenon
  • 86 radon
  • 118 oganesson

All None

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https://spellic.com/eng/exercise/noble-gases-by-atomic-number.10350205.html

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