Krypton

Kr

Kr

Krypton

83.798

atomic number: 36

Atomic Weight: 83.798

Melting Point: 115.79 K (-157.36°C or -251.25°F)

Boiling Point: 119.93 K (-153.22°C or -243.80°F)

Density: 0.003733 grams per cubic centimeter

Element Classification: Non-metal

Period Number: 4 Group Number: 18 Group Name: Noble Gas

-an inert gaseous element occurring in the air

- used in fluorescent lights and lasers

-Krypton was discovered on May 30, 1898 by Sir William Ramsay a Scottish chemist

not only home of superman

- Krypton is one of the rarest gases on Earth, composing only 1 part per million of the atmosphere by volume

- Krypton is one of the rarest gases on Earth, composing only 1 part per million of the atmosphere by volume

- It has a full outer shell of electrons, rendering it largely inert to reactions with other elements

- Krypton difluoride is only stable below minus 22 degrees Fahrenheit

- limited use

- the noble gas argon is usually used because it is cheaper

- The earth's atmosphere is about 0.0001% krypton