1.0 2010-04-08 22:05:57 UTC 2025-11-18 22:53:56 UTC FDB003788 Thorium Thorium is a naturally occurring radioactive chemical element with the symbol Th and atomic number 90. It was discovered in 1828 by the Swedish chemist Jons Jakob Berzelius and named after Thor, the Norse god of thunder. In nature, virtually all thorium is found as thorium-232, which undergoes alpha decay with a half-life of about 14.05 billion years. The element has no known biological role. [Wikipedia]. Thorium is found in many foods, some of which are cashew nut, almond, black walnut, and butternut. Th Thorium-232 Th 232.0381 232.03805036 thorium thorium 7440-29-1 [Th] InChI=1S/Th ZSLUVFAKFWKJRC-UHFFFAOYSA-N belongs to the class of inorganic compounds known as homogeneous actinide compounds. These are inorganic compounds containing only metal atoms,with the largest atom being a transition metal atom. Homogeneous actinide compounds Inorganic compounds Homogeneous metal compounds Homogeneous actinide compounds Homogeneous actinide actinoid atom f-block element atom logp 0 ChemAxon iupac thorium ChemAxon average_mass 232.0381 ChemAxon mono_mass 232.03805036 ChemAxon smiles [Th] ChemAxon formula Th ChemAxon inchi InChI=1S/Th ChemAxon inchikey ZSLUVFAKFWKJRC-UHFFFAOYSA-N ChemAxon polar_surface_area 0 ChemAxon refractivity 0 ChemAxon polarizability 1.78 ChemAxon rotatable_bond_count 0 ChemAxon acceptor_count 0 ChemAxon donor_count 0 ChemAxon physiological_charge 0 ChemAxon formal_charge 0 ChemAxon Specdb::MsMs 72120 Specdb::MsMs 72121 Specdb::MsMs 72122 Specdb::MsMs 130941 Specdb::MsMs 130942 Specdb::MsMs 130943 HMDB0029215 33385 Almond Type 1 specific Prunus dulcis 3755 0.02 0.02 0.02 mg/100 g Black walnut Type 1 specific Juglans nigra 16719 0.04 0.04 0.04 mg/100 g Butternut Type 1 specific Juglans cinerea 91214 0.01 0.01 0.01 mg/100 g Cashew nut Type 1 specific Anacardium occidentale 171929 0.02 0.02 0.02 mg/100 g Coconut Type 1 specific Cocos nucifera 13894 Common hazelnut Type 1 specific Corylus avellana 13451 0.01 0.01 0.01 mg/100 g Pistachio Type 1 specific Pistacia vera 55513 0.04 0.04 0.04 mg/100 g