<Tr> <Td> 105 </Td> <Td> dubnium </Td> <Td> 1.3 d </Td> <Td> Db </Td> </Tr> <Table> No primordial isotopes Longest lived isotope in hour / min / sec <Tr> <Th> Z </Th> <Th> Element </Th> <Th> t of </Th> <Th> Longest lived isotope </Th> </Tr> <Tr> <Td> 103 </Td> <Td> lawrencium </Td> <Td> 10 h </Td> <Td> Lr </Td> </Tr> <Tr> <Td> 85 </Td> <Td> astatine </Td> <Td> 8.1 h </Td> <Td> At </Td> </Tr> <Tr> <Td> 104 </Td> <Td> rutherfordium </Td> <Td> 1.3 h </Td> <Td> Rf </Td> </Tr> <Tr> <Td> 102 </Td> <Td> nobelium </Td> <Td> 58 min </Td> <Td> No </Td> </Tr> <Tr> <Td> 87 </Td> <Td> francium </Td> <Td> 22.0 min </Td> <Td> Fr </Td> </Tr> <Tr> <Td> 106 </Td> <Td> seaborgium </Td> <Td> 3 min </Td> <Td> Sg </Td> </Tr> <Tr> <Td> 111 </Td> <Td> roentgenium </Td> <Td> 2 min </Td> <Td> Rg </Td> </Tr> <Tr> <Td> 107 </Td> <Td> bohrium </Td> <Td> 1 min </Td> <Td> Bh </Td> </Tr> <Tr> <Td> 108 </Td> <Td> hassium </Td> <Td> 30 s </Td> <Td> Hs </Td> </Tr> <Tr> <Td> 112 </Td> <Td> copernicium </Td> <Td> 30 s </Td> <Td> Cn </Td> </Tr> <Tr> <Td> 110 </Td> <Td> darmstadtium </Td> <Td> 14 s </Td> <Td> Ds </Td> </Tr> <Tr> <Td> 113 </Td> <Td> nihonium </Td> <Td> 8 s </Td> <Td> Nh </Td> </Tr> <Tr> <Td> 109 </Td> <Td> meitnerium </Td> <Td> 4 s </Td> <Td> Mt </Td> </Tr> <Tr> <Td> 114 </Td> <Td> flerovium </Td> <Td> 2 s </Td> <Td> Fl </Td> </Tr> <Tr> <Td> 115 </Td> <Td> moscovium </Td> <Td> 6999800000000000000 ♠ 8 × 10 s </Td> <Td> Mc </Td> </Tr> <Tr> <Td> 116 </Td> <Td> livermorium </Td> <Td> 6998600000000000000 ♠ 6 × 10 s </Td> <Td> Lv </Td> </Tr> <Tr> <Td> 117 </Td> <Td> tennessine </Td> <Td> 6998500000000000000 ♠ 5 × 10 s </Td> <Td> Ts </Td> </Tr> <Tr> <Td> 118 </Td> <Td> oganesson </Td> <Td> 6996700000000000000 ♠ 7 × 10 s </Td> <Td> Og </Td> </Tr> </Table> <Tr> <Th> Z </Th> <Th> Element </Th> <Th> t of </Th> <Th> Longest lived isotope </Th> </Tr> <Tr> <Td> 103 </Td> <Td> lawrencium </Td> <Td> 10 h </Td> <Td> Lr </Td> </Tr>

Where are the most radioactive elements found on the periodic table