helium the gas

Helium - Neon Gas Laser - The figure shows the elements of a type of laser that is often found in student laboratories. The glass discharge tube is filled with a 80%-20% mixture of the inert gases helium and neon. Helium is the "pumping" medium and neon is th..

The glass discharge tube is filled with a 80%-20% mixture of the inert gases helium and neo..

Student i found the thermal expansion delta L=cdDELTAt Student ooppss its actually delta L=aLdeltaL Student ohhh deltaT Tutor delta L = a L delta T, right? Tutor instead of a i used alpha, thats all Student ok this one has 3 parts to it Student ..

a) Helium - It is commercially obtained from natural gas, which contains H 2 S, CO 2 , H 2 O, N 2 , hydrocarbons and helium. Natural gas is compressed and cooled when nitrogen, hydrocarbon etc. get liquefied while helium remains unliquified, as a ..

Hydrogen being the lightest gas, was earlier used in meteorological balloons and dirigibles (a balloon airship used during world war I). But since it is highly combustible, it was replaced by helium gas even though helium is nearly four times denser than hyd..

A hydrogen atom has only one electron in its valence shell. It needs one more electron to fill its valence shell. The completed shell has the electronic arrangement of the noble gas helium, yet an octet is not completed. However we still get a stable molecul..

The life cycle of a star begins with the accretion of hydrogen and helium gas at -173 o C into smaller dense clouds, which contract under their own gravity. This dense cloud of gas contracting under its own gravity is called a Protostar. A cloud of gas ..

Noble gases always occur in free state because of their inert nature. All the noble gases, except radon are present in air in small amounts. The relative abundance of the noble gases in air is = 1%. Helium is present in natural gas up to the extent of 10 per cent. It is al..

Where duplet is formed? A hydrogen atom has only one electron in its valence shell. It needs one more electron to fill its valence shell. The completed shell has the electronic arrangement of the noble gas helium, yet an octet is not completed. However we still get ..

Uses of Noble Gases - Argon is used mainly to provide an inert atmosphere in high temperature metallurgical processes (arc welding of metals or alloys) and for filling electric bulbs. It is also used in the laboratory for handling substances that are air-sensitive. Helium is a non-flammab..