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