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The heaviest gas at room temperature ( 75º F, 293.15º K) is WF6, or Tungsten Hexafluoride (297.83 g/mol, that's almost 10 times heavier than air!). It changes phase (becomes liquid) at 290.25º K, or about 62.78º F.

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16y ago
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16y ago

Radon is the heaviest of noble gases (222 g/mol). The heaviest gas at room temperature ( 75º F, 293.15º K) is WF6, or Tungsten Hexafluoride (297.83 g/mol, that's about 10 times heavier than air!). It changes phase (becomes liquid) at 290.25º K, or about 62.78º F.

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14y ago

Radon (Rn) is the heaviest noble gas - it has an atomic weight of 222.

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12y ago

Radon is the heaviest gas (as density) known today: 9,73 g/cm3 at STP.

For ununoctium coherent experimental data don't exist now.

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14y ago

Radon is the heaviest known gas with an atomic weight of 222

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13y ago

Radon with an atomice mumber of 86

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Q: What is the name of the heaviest known gas in the periodic table?
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