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Q: What is the heaviest noble gas?

  • 1
    krypton
  • 2
    radon
  • 3
    helium
  • 4
    xenon
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Answer : 2. "radon"
Explanation :

Answer: B) radon Explanation: The seven elements — helium, neon, argon, krypton, xenon, radon, and oganesson of Group 18 of the periodic table are Noble or Inert gases.   Radon is the heaviest and Helium is the lightest gases of the noble gases.

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