Thorium
Esquema
Jerarquía
<materiales por composición> > material inorgánico > metal > <metal por composición u origen> > metal no ferroso
Descripción
Pure metallic element having symbol TH and atomic number 90; a radioactive, soft, silvery metal most often extracted from the phosphate mineral, monazite. Use also for this metal as processed and formed, usually in combination with other substances, to make various objects and materials.
URI original del concepto
Otros términos
- TH [en]