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Luku 9 alkuaineita s.43

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  • typpi
    N
  • helium
    He
  • N
    typpi
  • kulta
    Au
  • C
    hiili
  • He
    helium
  • Au
    kulta
  • vety
    H
  • rauta
    Fe
  • O
    happi
  • Fe
    rauta
  • H
    vety
  • happi
    O
  • hiili
    C
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