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Helium is the lightest inert gas. It is a monatomic gas with an average atomic weight of about 4.
The only atom lighter than that is hydrogen - which forms a diatomic gas with molecular wight of about 2 - BUT - it is anything but inert! Hydrogen is highly flammable and a commonly used reactant for a lot of syntheses. The next lightest gas that is sort of inert is nitrogen - which is quite a bit heavier - at a molecular weight of about 14. (Nitrogen is not particularly reactive at room temperature so it is often used as an "inert" gas - even though it isn't really totally inert.) The next lightest noble gas is Neon - which, although it forms a monatomic gas, has an atomic wight of about 20 - even heavier than Nitrogen.
What else can I help you with?
What is the lightest nonflammable gas?
The lightest non-flammable gas is Helium.Note: After Helium, Nitrogen technically comes next however it can burn at a very high temperature. Because of this, Neon would be the next lightest truly non-flammable gas.
Is a Helium a stable?
yes..
What element is lightest the elements?
The lightest element of all should have the lightest atomic mass. It is hydrogen-1 isotope. This atom has only one proton and no neutrons.
Which is the lightest non-metal?
The lightest 'non-metal' could be Hydrogen and Helium! Both are gases, and therefore, not a metal.
What is another word for chemically nonreactive?
inert as in the inert gases or "noble" gases
Lightest inert gas?
Helium
Is helium the lightest inert gas?
Yes, it is.
Which is the lightest inert gas which makes your voice squeaky?
Helium
What is the lightest nonflammable gas?
The lightest non-flammable gas is Helium.Note: After Helium, Nitrogen technically comes next however it can burn at a very high temperature. Because of this, Neon would be the next lightest truly non-flammable gas.
What is one important fact about helium?
Helium is the second lightest element. Helium has the lowest boiling point among all the elements. It is chemically inert.
What is An inert gas with a greater atomic mass then helium?
Helium is the lightest noble gas, so neon, argon, krypton and xenon are all heavier noble gases. Radon's also a noble gas and it's heavier than helium, but it's radioactive so is it really inert?
What is the opposite of lightest?
The opposite of lightest is heaviest.
What are the lightest elements?
the lightest elements are gases and the lightest of these are hydrogen and helium.
A very light inert gas named after the Greek god of the sun?
Helium is the inert gas named after the Greek god of the sun, Helios. It is the second lightest element on the periodic table and is commonly used in balloons, blimps, and as a cooling agent in various applications.
Why helium gas is used in weather balloons but not hydrogen?
Because helium (He) is lighter than air and not flammable like Hydrogen (H) which is the lightest element.
Which is the lightest mettal?
The lightest metal is lithium.
What is the superlative for bright?
The superlative form of the adjective 'light' is lightest.
