atomic number 39

Thesaurus

Noun

1.

atomic number 39 - a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloysY, yttriummetal, metallic element - any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.fergusonite - a dark mineral consisting of oxides of yttrium and erbium and tantalum and other mineralsgadolinite, ytterbite - a mineral that is a source of rare earths; consists of silicates of iron and beryllium and cerium and yttrium and erbiumxenotime - a brown-to-yellow mineral that is a phosphate of yttrium in crystalline form