40 Zr 91.2242

Zirconium

TRANSITION METAL

Phase: Solid

Discovered: Martin Heinrich Klaproth

Block: D

Summary

Zirconium is a chemical element with symbol Zr and atomic number 40. The name of zirconium is taken from the name of the mineral zircon, the most important source of zirconium. The word zircon comes from the Persian word zargun زرگون, meaning "gold-colored".

Appearance: silvery white

Source: Wikipedia

Physical Properties

Atomic Mass 91.2242 u

Density 6.52 g/cm³

Melting Point 2128 K

Boiling Point 4650 K

Molar Heat 25.36 J/(mol·K)

Electron Affinity 41.806 kJ/mol

Ionization Energies

1^st: 640.1 kJ/mol

2^nd: 1270 kJ/mol

3^rd: 2218 kJ/mol

4^th: 3313 kJ/mol

5^th: 7752 kJ/mol

6^th: 9500 kJ/mol