Is helium lighter or heavier than hydrogen?

Helium exists as a monatomic gas, with atomic mass of 4.0. Thus any gas with a molecular mass higher than 4.0 would be heavier than helium. Hydrogen is the only gas that is lighter than helium; all others are heavier than helium.

Hydrogen is lighter than Helium.

Helium is lighter than air

Hydrogen is lighter than Helium.

Hydrogen is lighter. This is why balloons rise, they have hydrogen in them. ____ Hydrogen is lighter than air, and has been used in large balloons in the past (such as the Hindenburg). However, Helium is also lighter than air, and is what is used in most balloons today, since it is not flammable.

Helium is a gas, so it is not lighter than gas. It is like asking why is water heavier than liquid. Helium is less dense than all other gases except hydrogen, because it has an atomic weight of 4.

Yes, a mole of hydrogen weighs 1 g, a mole of helium weighs 4 g. Still lighter than air, as a mole of air weighs about 30 g.

Helium is heavier than hydrogen. The density of hydrogen gas is 0.08988 g/L and that of helium gas is 0.1786 g/L

Helium is infact, lighter than air.

EVERYTHING except hydrogen is heavier than helium. Helium is the second-lightest element.

EVERYTHING except hydrogen is heavier than helium. Helium is the second-lightest element .

No. Carbon dioxide is heavier than helium.

Helium particles are lighter than air, actually.But hydrogen is lighter than helium particles.

Yes, hydrogen is about half the density of helium.

It is lighter than air.

No. Helium is lighter than air

No. Hydrogen is the lightest element.

No, helium is almost 4 times as heavy as hydrogen.

Hydrogen is lighter than helium. So hydrogen balloon will float better than helium.

No, helium has the second lowest density out of all the elements and with Hydrogen having the smallest density but it not being in the air it means the canister of air is heavier.

It is easier to find helium than hydrogen

It sinks as it's heavier than Oxygen. There are only 3 elements that are gases at ordinary temperatures that are lighter than Oxygen: Hydrogen, Nitrogen and Helium.

Elements heavier than hydrogen and helium are formed in super novas. When a star of the right size explodes, only then is there enough energy to create the heavier elements.

Because hydrogen is lighter that helium

Helium is a gas and is far more lighter than carbon which is a solid.

helium is 2 times heavier than hydrogen helium is not so reactive , hydrogen is extremely flamable unlike helium.

Hydrogen and Helium are both lighter than air.

Hydrogen: 0.0899 g/l Helium: 0.1785 g/l. So, hydrogen is lighter than helium

yes, anything with a lower atomic number would be lighter, for example, helium is lighter than air, which is why balloons float when filled with helium... the lighter substance rises above the heavier....

Technicaly, its lighter than oxigen, nitrogen, and all the other gasses, (i believe) exept hydrogen and helium. so yes, i SOULD be lighter than air, but if you let go of it, it will fall. but it is the lightest metal. So in conclusion, i should be lighter than air, but.isn't. how interesting!

Gaseous elements that are lighter than air: Hydrogen, Helium, Neon.

no hydrogen is lighter

helium is after haydrogen it means hygrogen is lighter than helium. now the question arises that "Q.1"why we use helium instead of hydrogen coz hydrogen is lighter than helium. Ans.1:hydrogen has 1 electron in its 1st shell and helium has it's complete shell with two electron. When we fill hydrogen in the baloon they form ionic bond... so it is used double...

Because Hydrogen is highly flammable, and will easily and rapidly burn in the air and turn into H2O (water).

Hot air, hydrogen or helium are lighter than cold air.

Helium atoms are lighter than any atoms/molecules except hydrogen. I don't know what you mean by "the buoyant force".

No nitrogen gas is much heavier then hydrogen.

Hydrogen, Helium and also Nitrogen (just)

they were produced inside stars

Because, carbon dioxide is heavier than air whereas helium is lighter than air.

Contemporary weather balloons are usually filled with helium. Helium is lighter than air, and this allows the balloon to rise as this gas is lighter than air. Hydrogen would also work as it has a low density, like helium. And hydrogen is a bit cheaper than helium because it can be "made" from water. But hydrogen is flammable or even explosive, and it is generally not used for that reason.

Isotopes are heavier or lighter than the original atom. An isotope of Hydrogen that is heavier by three neutrons -Tritium has three neutrons, making it much heavier than Hydrogen.

No, Hydrogen is lighter than Helium. However, Helium is the 2nd lightest element with an atomic number of 2.

Neon has 8 more protons and 8 more electrons than helium. It's heavier, but still lighter than air.

A supernova is a star that explodes. Stars about the size of our Sun explode when they run out of "fuel". The fuel they have is Hydrogen which they fuse into Helium and thus convert mass into energy (they shine brightly), Then the Helium and some Hydrogen are fused into heavier elements (Lithium etc) making more energy. All elements heavier than Carbon and lighter than Iron are made in the supernova explosion that comes at… Read More

Hydrogen has 1 proton and Helium has 2 protons and 2 neutrons. Neutrons and protons weigh approximately the same. Electrons have very little, if any weight. Therefore Helium is about 4 times heavier than Hydrogen

No, many are lighter. Perhaps the most common lighter-than-air gas is helium, which is used to fill party balloons.

Hydrogen (H2) is lighter than Helium (He) BUT it has one BIG problem! It is Highly EXPLOSIVE, thus it is not used in balloons, etc.

Hydrogen is higly explosive ! Remember the Hindenburg disaster.

While it is not a "Noble Gas" it is much lighter than air. It is not lighter than Hydrogen, but it does not ignite as easily.