Thorium

en: Thorium   –   de: Thorium   –   fr: Thorium   –   it: Torio   –   ja: トリウム   –   ru: Торий   -   tr: Toryum
Position in the periodic table symbol: Th atomic number: 90 chemical series: actinides
		sample	electron shell

Miscellaneous

• 
  Monazite, a rare-earth-and-thorium-phosphate mineral is the primary source of the world's thorium
• 
  Monazite - tabular crystal, Rostadheia, Iveland, Norway