Yttrium

yttrium
Basic Information
Name: Yttrium 
Symbol: Y 
Atomic Number: 39 
Atomic Mass: 88.90585 amu 
Melting Point: 1523.0 °C (1796.15 K, 2773.4 °F) 
Boiling Point: 3337.0 °C (3610.15 K, 6038.6 °F) 
Number of Protons/Electrons: 39 
Number of Neutrons: 50 
Classification: Transition Metal 
Crystal Structure: Hexagonal 
Density @ 293 K: 4.469 g/cm3 
Color: silvery
Date of Discovery: 1794 
Discoverer: Johann Gadolin 
Name Origin: After Ytterby (a town in Sweden) 
Uses: color TV's, radars 
Obtained From: monazite, xenotime, yettriac