Zirconium

Transition metal

Symbol: Zr

Atomic Number: 40

Standard State: Solid

Atomic Mass: 91.22

Electron Configuration: [Kr]5s2 4d2

Electronegativity: 1.33

Atomic Radius: 186

Ionization Energy: 6.634

Melting Point: 2128

Boiling Point: 4682

Density: 6.52

Year Discovered: 1789