Pr

PARASEODYMIUM

Definition from 'prasias didymus' or green twin.its rare twin is neodymium. a mixture of two element had formerly called didymium.

Discovery 1885 by carl auer von welsbach of austria

Uses coloring glass, core mat for carbon arcs

Group of Elements lanthanide(Solid)

Atomic Weight 140.90765

Oxidation State +3

Melting Point 931

Boiling Point 3212

Density 6.77 g/cm3

Electronegativity 1.1