Krypton (Kr)

Krypton (Kr)


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

Phase at Room Temperature: Gas

Element Classification: Non-metal

Period Number: 4

Group Number: 18

Group Name: Noble Gas

Krypton isotopes are used in various medical and scientific applications. Kr-82 is used for the production of Rb-81/Kr-81m generators. Many of the stable isotopes of Krypton are used in the study of the pulmonary system. Kr-78 can be used for the production of Br-75 although production of Br-75 via Se-76 is more common. Kr-86 has been used to define the standard measure of length: 1 meter is exactly 1,650,763.73 wavelengths of this isotope.

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