All chemical elements

Symbol

Zr

Atomic number

40

Chemical property

Transition metal

Origin o the name

Persian Zargun, 'gold-colored'; German Zirkoon, 'jargoon'

Group

4

Period

5

Atomic weight (u)

91.224

Atomic weight uncertainty (u)

0.002

Density (g/cm³)

6.506

Melting point (K)

2128

Boiling point (K)

4682

Heat capacity (J/(g·K))

0.278

Electro-negativity

1.33

Abundance in earth's crust (mg/kg)

165