However, its compounds have been synthesized in the laboratory, and these synthetic compounds are used for research purposes. This element is considered to be one of the inert gases, which means it is chemically inactive.Between the period of 19, scientists defined meter as 1,650,763.73 times the width of this line produced by this element.

Krypton-86, on heating, gives off a clear bright line, which is reddish yellow in color. An interesting application of this gas was in defining a meter.This noble gas is used in the manufacture of quasi-homogeneous electromagnetic calorimeters that are used to measure the quantity of heat.The pathway can be determined by holding a detection device over the person’s body. When this gas is inhaled, it is absorbed by the blood and travels through the bloodstream and the heart, along with blood. Krypton-85 is used to study the flow of blood in the human body.One of the radioactive isotopes of krypton can be combined with phosphorus to produce materials that glow or shine in the dark.This element, like other inert gases, is used in making luminous, fluorescent lights used in different kinds of lamps, incandescent light bulbs, advertising signs, etc.It is also used in slide and movie projectors. When ionized, krypton gas emits bright white light, and hence Kr-based bulbs are widely used in high speed photography.The element Krypton is characterized by emission of sharp spectral lines, out of which the green and yellow lines are the strongest and most prominent.

As most of the nuclear reactors are located in the northern hemisphere, the concentration of this element at the north pole is about 30% higher, than that at the south pole.

It is produced in the Earth’s crust as a result of radioactive decay of thorium and uranium.

The half life of the radioactive form of this element is 81(Kr) is 250,000 years.

It has 31 isotopes in all, out of which 5 are considered stable and the rest are radioactive.

It has a boiling point of -153.2✬, with a density of 3.75 grams per liter.

The melting point of krypton is -157.4✬.This element has an atomic weight of 83.798 and is present in period 4 of the periodic table.The name Krypton is derived from a Greek word ‘kryptos’, which means ‘hidden’.

Gas is widely used in luminous signs