Neon

The particles in gases are widely spaced, so the noble gases have low densities: helium, at the top of group 0, has the lowest density in the group. density increases going down the group.

denser than air, so it stops air getting to the metal. inert, so the hot metal cannot oxidise and spoil the weld.

The particles in gases are spread far apart, so gases have low densities. Helium has the lowest density in the group. The densities increase as you go down the group. Radon, at the bottom of the group, is the densest gas.

In nature the atoms of noble gases do not bond either with other gases or with each other. Helium exists as atoms of Helium not as diatomic molecules. Some of the larger noble gases can be made to form molecules. This does not normally happen in natural conditions.

The noble gases are used to form inert atmospheres, typically for arc welding, to protect specimens, and to deter chemical reactions. The elements are used in lamps, such as neon lights and krypton headlamps, and in lasers. Helium is used in balloons, for deep-sea diving air tanks, and to cool superconducting magnets.

Unlike noble gases, an inert gas is not necessarily elemental and is often a compound gas. This is a tendency, not a rule, as noble gases and other “inert” gases can react to form compounds. The group 18 elements include helium, neon, argon, krypton, xenon and radon. They are referred to as noble gases or inert gases.

Applications of Noble Gases

• Helium. Helium is used as a component of breathing gases due to its low solubility in fluids or lipids.
• Neon. Neon has many common and familiar applications: neon lights, fog lights, TV cine-scopes, lasers, voltage detectors, luminous warnings, and advertising signs.
• Argon.
• Krypton.
• Xenon.
• Radon.

Hydrogen

The divalent molecule is not the natural state of xenon in the Earth’s atmosphere or crust, so for all practical purposes, radon is the heaviest gas.

Helium

– Smoke+combustion gases is lighter than air, and will not start to settle out until the temperature drops to around air temperature. – If the air is not moving fast enough, it doesn’t pick up any dust. – If the air is not moving, smoke still rises.

Oxygen is denser than both air and nitrogen, at all temperatures and pressures, but only slightly. Since they don’t separate from each other, we generally don’t worry which is lighter or heavier. The difference in the density of nitrogen and oxygen gas comes from their molecular weight, which is small (4 g/mol).

liquefied petroleum gas

LPG is a gas at atmospheric pressure and normal ambient temperatures, but it can be liquefied when moderate pressure is applied or when the temperature is sufficiently reduced. It can be easily condensed, packaged, stored and utilized, which makes it an ideal energy source for a wide range of applications.

Nitrogen gas is filled in all packed items to prevent spoilage. In Kurkure also.

Two types of natural gas are used as a vehicle fuel: compressed natural gas (CNG) and liquefied natural gas (LNG).

Types of Fuel for Cars

• Gasoline. Gasoline is the most common automobile fuel and is used all over the world to power cars, motorcycles, scooters, boats, lawnmowers, and other machinery.
• Diesel Fuel.
• Bio-diesel.
• Ethanol.

While gasoline and diesel are the most common and readily available types of fuel for cars, in most cases, any vehicle can be converted to use an alternative fuel source.