What is the ore of thorium



Half-life for Th-232 *):
14 billion yearsrelat. Atomic mass  
Atomic number    
Melting point    
boiling point    
Oxidation numbers    
density    
Hardness (Mohs)    
Electronegativity    
Electron config.    
Natural frequency    
    
*) most durable
isotope
 232,0377
90     
1750 ° C   
4785 ° C   
4, 3, 2    
11.7 g / cm³   
2.5 to 3 (estimated)   
1.3 (Pauling)   
[Rn] 6d27s2    
Th-232 almost 100%   
Traces of isotopes   
Th-227, Th-228   
Th-229, Th-230   
Th-231 and Th-234