Which element is the heaviest gas at room temperature?

Answer 1

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......

Answer 2

The elements that are gases at room temperature include hydrogen. They also include all the inert or noble gases, which are those elements in Group 18: helium, neon, argon, krypton, xenon and radon. We also know that the halogens fluorine, chlorine and bromine are gases at room temperature (20°C). That leaves nitrogen and oxygen as the last of the elements that are gases at room temperature. All of these elements are nonmetals or halogens or inert gases. LAUGH OUT LOUD. Hydrogen, which appears at the top of Group 1, is not considered a metal, though all the elements below it are the Alkali Metals of Group 1.

A link is provided below to the Wikipedia post on the Periodic Table of elements (standard). Each element on the table is a link to the post on that element.

EDIT: bromine is not a gas at room temperature it is a liquid. That makes 11 non-metals that are in the gaseous state at room temperature

If any element has a symbol of (g) on the right oh its symbol, then it shows that the element is in gaseous state.

Oxygen, Hydrogen, Nitrogen, Fluorine, Chlorine and all of the inert gases are gases at room temperature and pressure. There are many. Hydrogen, oxygen, nitrogen, neon, argon, helium, radon, krypton, chlorine, bromine. And some more.

Answer 3

The heaviest element that is a gas at ordinary Earth temperatures is radon. Ununoctium is heavier and may be a gas, but is expected to be solid and only about 4 atoms of it have ever been synthesized anyway... it's kind of meaningless to talk about whether something is a solid, liquid, or gas when you're talking about isolated atoms of the stuff.

Answer 4

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

Answer 5

hydrogen

helium

Nitrogen

oxygen

Fluorine

Neon

chlorine

Argon

Answer 6

There are several elements which are gas at the room temperature , some of them are 1) Oxygen (2)nitrogen (3) and many more

Answer 7

Osmium.

Iridium is a close second.

Gold is right up there.

Lead is not even close.

Answer 8

Radon is the heaviest gas at room temperature. It is a noble gas and is the heaviest noble gas, with a density higher than air.