Talk:Ripanga pūmotu

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He reo Pākehā ēnei wāhanga, ka waiho i konei:

Takanga tūturu

  • those with solid borders have isotopes that are older than the Earth (Primordial elements)
  • those with dashed borders naturally arise from decay of other chemical elements
  • those with dotted borders do not occur naturally (pūmotu waihanga)
  • those without borders have not been discovered yet