Grundämnen Kemi Grupp 18

The exercise was created 2022-09-26 by NA22GKC. Question count: 7.




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  • helium ₂He
  • neon ₁₀Ne
  • argon ₁₈Ar
  • krypton ₃₆Kr
  • xenon ₅₄Xe
  • radon ₈₆Rn
  • oganesson ₁₁₈Og

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