<Tr> <Th> Discovery </Th> <Td> Franz - Joseph Müller von Reichenstein (1782) </Td> </Tr> <Tr> <Th> First isolation </Th> <Td> Martin Heinrich Klaproth </Td> </Tr> <Tr> <Th_colspan="2"> Main isotopes of tellurium </Th> </Tr> <Tr> <Td_colspan="2"> <Table> <Tr> <Th> Isotope </Th> <Th> Abundance </Th> <Th> Half - life (t) </Th> <Th> Decay mode </Th> <Th> Product </Th> </Tr> <Tr> <Th> Te </Th> <Td> 0.09% </Td> <Td_colspan="3"> stable </Td> </Tr> <Tr> <Th> Te </Th> <Td> syn </Td> <Td> 16.78 d </Td> <Td> ε </Td> <Td> Sb </Td> </Tr> <Tr> <Th> Te </Th> <Td> 2.55% </Td> <Td_colspan="3"> stable </Td> </Tr> <Tr> <Th> Te </Th> <Td> 0.89% </Td> <Td_colspan="3"> stable </Td> </Tr> <Tr> <Th> Te </Th> <Td> 4.74% </Td> <Td_colspan="3"> stable </Td> </Tr> <Tr> <Th> Te </Th> <Td> 7.07% </Td> <Td_colspan="3"> stable </Td> </Tr> <Tr> <Th> Te </Th> <Td> 18.84% </Td> <Td_colspan="3"> stable </Td> </Tr> <Tr> <Th> Te </Th> <Td> syn </Td> <Td> 9.35 h </Td> <Td> β </Td> <Td> </Td> </Tr> <Tr> <Th> Te </Th> <Td> 31.74% </Td> <Td> 2.2 × 10 y </Td> <Td> β β </Td> <Td> Xe </Td> </Tr> <Tr> <Th> Te </Th> <Td> syn </Td> <Td> 69.6 min </Td> <Td> β </Td> <Td> </Td> </Tr> <Tr> <Th> Te </Th> <Td> 34.08% </Td> <Td> 7.9 × 10 y </Td> <Td> β β </Td> <Td> Xe </Td> </Tr> </Table> </Td> </Tr>

Prefix used to indicate an element that stands in the same family of the periodic table