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radon
radón
Last Update: 2014-03-16 Usage Frequency: 14 Quality: Reference: Wikipedia
helium, neon, argon, krypton, xenon, radon gasa nobilia sunt.
helio, neón, argón, criptón, xenón y radón son gases nobles.
Last Update: 2014-02-01 Usage Frequency: 1 Quality: Reference: Wikipedia