Yttrium - ASCII Periodic Table of the Elements

ASCII PERIODIC TABLE OF THE ELEMENTS

  Y

Relative atomic mass: 88.90585 ± 0.00002

English: Yttrium
French: Yttrium
Croatian: Itrij
German: Yttrium
Italian: Ittrio
Spanish: Ytrio

Atomic number: 39
Group numbers: 3
Period: 5
Standard state (20 °C): solid

Discovery: 1794 Johan Gadolin (FI)

Yttrium was discovered by Johan Gadolin (FI) in 1794. Named after 'Ytterby', a village in Sweden. It is a silvery, ductile, fairly reactive metal that is easily combustible, reacts with oxygen in water to release hydrogen. Exposed surfaces form oxide film. Yttrium is found in minerals such as monazite, xenotime and yttria. It is combined with europium to make red phosphors for colour TV's. Yttrium oxide and iron oxide combine to form a crystal garnet used in radar.

Electronic configuration: [Kr] 4d¹ 5s²
Formal oxidation number: +3
Atomic radius: 177.6 pm

Electronegativities: 1.22
Thermal conductivity: 17.2 W/(m K)
Electrical resistivity (20 °C): 57 μΩcm

Melting point: 1522 °C
Boiling point: 3345 °C

Heat of fusion: 17.2 kJ/mol
Heat of vaporization: 367.4 kJ/mol
Heat of atomization: 420.45 kJ/mol