All chemical elements

Symbol

Kr

Atomic number

36

Chemical property

Noble gas

Origin o the name

the Greek kryptos, 'hidden'

Group

18

Period

4

Atomic weight (u)

83.798

Atomic weight uncertainty (u)

0.002

Density (g/cm³)

0.003733

Melting point (K)

115.79

Boiling point (K)

119.93

Heat capacity (J/(g·K))

0.248

Electro-negativity

3

Abundance in earth's crust (mg/kg)

0.0001