As we mentioned above, helium gas is not flammable. It is not explosive either. You can heat it up or cool it until it turns to a liquid (at below absolute zero) and it still won’t catch fire. Helium is one of the most stable elements, which means that it is not very reactive with other elements.

All the different elements are arranged in a chart called the periodic table. Here are the main features of the table: the horizontal rows are called periods. the vertical columns are called groups.

Breathing in pure helium can cause death by asphyxiation in just minutes. Inhaling helium from a pressurized tank can also cause a gas or air embolism, which is a bubble that becomes trapped in a blood vessel, blocking it. The blood vessels can rupture and hemorrhage.

I’m lighter than air but a million men can’t lift me. What am I? A bubble.

Water vapor molecules, which are one oxygen atom with a weight of 16 and two hydrogen atoms each with a weight of 1, add up to a molecular weight of 18, which is much lighter than the nitrogen and oxygen they displace when they evaporate into air.

No. Hydrogen is the simplest and lightest possible atom. It only has one proton and no neutrons in its nucleus, and one electron to match. You can’t go lower than one.

adjective (lighter-than-air when prenominal) 1. having a lower density than that of air. 2. of or relating to an aircraft, such as a balloon or airship, that depends on buoyancy for support in the air.

This is why the balloon filled with helium does nothing more than pop. Hydrogen gas is very flammable. This is why the balloon filled with hydrogen ignites. The heat given off by the candle provides the activation energy required for the reaction that produces water from hydrogen and oxygen.

Originally Answered: can hydrogen and helium bond together? Hydrogen and Helium cannot bond together. Put aside the inertness of helium (or all noble gases), bond formation is only favored when the final state of the two elements is more stable than their initial state.

“Since hydrogen is an unstable, inflammable gas, there is a great danger associated with hydrogen balloons. They easily explode and catch fire.

An explosion cannot occur in a tank or any contained location that contains only hydrogen. An oxidizer such as oxygen must be present in a concentration of at least 10% pure oxygen or 41% air. Hydrogen can be explosive at concentrations of 18.3% to 59%.

Hydrogen isn’t poisonous, but if you should breathe pure hydrogen you could die of asphyxiation simply because you’ll be deprived of oxygen. Because it’s highly compressed, liquid hydrogen is extremely cold. If it should escape from its tank and come in contact with skin it can cause severe frostbite.

According to OSHA, “Hydrogen used in the fuel cells is a very flammable gas and can cause fires and explosions if it is not handled properly.