NO. 039Transition

Y

Yttrium

Yttrium is a silvery metal used in LEDs, lasers, and high-temperature superconductors.

Crystal Structure

Hexagonal close-packed (hcp)

Atomic Mass88.91 u

Density4.47 g/cm³

Melting Point1799 K

Boiling Point3618 K

Atomic Radius180 pm

Electronegativity1.22

Ionization Energy600 kJ/mol

Electron Affinity30 kJ/mol

Bonding TypeMetallic

Oxidation States3

Acid/BaseBasic

ReactivityMedium

Electron Configuration

[Kr] 4d1 5s2

Discovered ByJohan Gadolin

Year1794

Known Isotopes

Y-89