Atomic Number 39     Atomic Mass 88.905849     Density 4.4689 g/mL

State solid     Color silvery white      Electronegativity 1.22

Melting Point 1522°C     Boiling Point 3338°C

Natural Isotopes Y-89 100%

Abbreviated Electron Configuration [Kr] 4d¹ 5s²

Discovered by Johann Gadolin in 1794.