<Tr> <Td> 90 </Td> <Td> Thorium </Td> <Td> </Td> <Td> 6993100000000000000 ♠ 1 × 10 </Td> <Td> </Td> <Td> No </Td> <Td> toxic, radioactive </Td> <Td> </Td> </Tr> <Tr> <Td> 92 </Td> <Td> Uranium </Td> <Td> </Td> <Td> 6993100000000000000 ♠ 1 × 10 </Td> <Td> 6991300000000000000 ♠ 3.0 × 10 </Td> <Td> No </Td> <Td> toxic, radioactive </Td> <Td> </Td> </Tr> <Tr> <Td> 62 </Td> <Td> Samarium </Td> <Td> </Td> <Td> 6992500000000000000 ♠ 5.0 × 10 </Td> <Td> </Td> <Td> No </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 74 </Td> <Td> Tungsten </Td> <Td> </Td> <Td> 6992200000000000000 ♠ 2.0 × 10 </Td> <Td> </Td> <Td> No </Td> <Td> </Td> <Td> 6 </Td> </Tr>

Where are carbon atoms found in our body