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Which element is the heaviest gas at room temperature?

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Osmium This is totally incorrect. Osmium has the tenth highest melting point of all elements and therefore cannot be a gas at room temperature. Radon is heavier and also a gas. The atomic weight of radon is 222 atomic mass units making it the heaviest gas known. It is also radioactive and can collect in basements/cellars of homes. From Wikipaedia :: According to the United States Environmental Protection Agency, radon is the second most frequent cause of lung cancer, after cigarette smoking, causing 21,000 lung cancer deaths per year in the United States......
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An element that is a gas at room temperature?

Helium is an element which is in the form of gas at room temperature. Why not other inert gasses too are good examples. Neon, Argon, xenon

How do you tell if an element is a gas solid or liquid at room temperature?

you can tell whether the element is a liquid or gas by the  melting/boiling points if it's greater than 20 degrees Celsius then  it will be a solid, if the element's melting

Element in group 5 that is a gas at room temperature?

Nitrogen is an element that is a gas at room temperature. Nitrogen is part of group V in some versions of the periodic table, although in modern textbooks in which the periodi

Is oxygen an element that is a gas at room temperature?

yes. at least the last time i breathed it was........