<Tr> <Td_colspan="2"> <Ul> <Li> view </Li> <Li> talk </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> view </Li> <Li> talk </Li> <Li> </Li> </Ul> <P> Boron (B) naturally occurs as isotopes and B, the latter of which makes up about 80% of natural boron . There are 14 radioisotopes that have been discovered, with mass numbers from 6 to 21, all with short half - lives, the longest being that of B, with a half - life of only 770 milliseconds (ms) and B with a half - life of 20.2 ms . All other isotopes have half - lives shorter than 17.35 ms, with the least stable isotope being B, with a half - life of 150 yoctoseconds (ys). Those isotopes with mass below 10 decay into helium (via short - lived isotopes of beryllium for B and B) while those with mass above 11 mostly become carbon . </P> <Table> <Tr> <Th> nuclide symbol </Th> <Th> Z (p) </Th> <Th> N (n) </Th> <Th> isotopic mass (u) </Th> <Th> half - life </Th> <Th> decay mode (s) </Th> <Th> daughter isotope (s) </Th> <Th> nuclear spin </Th> <Th> representative isotopic composition (mole percent) </Th> <Th> range of natural variation (mole percent) </Th> </Tr> <Tr> <Td> </Td> <Td> 5 </Td> <Td> </Td> <Td> 6.04681 (75) #</Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> 5 </Td> <Td> </Td> <Td> 7.02992 (8) </Td> <Td> 350 (50) × 10 s (1.4 (2) MeV) </Td> <Td> p </Td> <Td> Be </Td> <Td> (​ ⁄ −) </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> 5 </Td> <Td> </Td> <Td> 8.0246072 (11) </Td> <Td> 770 (3) ms </Td> <Td> β, α </Td> <Td> He </Td> <Td> 2 + </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> 5 </Td> <Td> </Td> <Td> 9.0133288 (11) </Td> <Td> 800 (300) × 10 s (0.54 (21) keV) </Td> <Td> p, α </Td> <Td> Be </Td> <Td> ​ ⁄ − </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> 5 </Td> <Td> 5 </Td> <Td> 10.0129370 (4) </Td> <Td_colspan="3"> Stable </Td> <Td> 3 + </Td> <Td> 19.9 (7) </Td> <Td> 18.929--20.386 </Td> </Tr> <Tr> <Td> </Td> <Td> 5 </Td> <Td> 6 </Td> <Td> 11.0093054 (4) </Td> <Td_colspan="3"> Stable </Td> <Td> ​ ⁄ − </Td> <Td> 80.1 (7) </Td> <Td> 79.614--81.071 </Td> </Tr> <Tr> <Td> </Td> <Td> 5 </Td> <Td> 7 </Td> <Td> 12.0143521 (15) </Td> <Td> 20.20 (2) ms </Td> <Td> β (98.4%) </Td> <Td> </Td> <Td> 1 + </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> β, α (1.6%) </Td> <Td> Be </Td> </Tr> <Tr> <Td> </Td> <Td> 5 </Td> <Td> 8 </Td> <Td> 13.0177802 (12) </Td> <Td> 17.33 (17) ms </Td> <Td> β (99.72%) </Td> <Td> </Td> <Td> ​ ⁄ − </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> β, n (0.279%) </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> 5 </Td> <Td> 9 </Td> <Td> 14.025404 (23) </Td> <Td> 12.5 (5) ms </Td> <Td> β (93.96%) </Td> <Td> </Td> <Td> 2 − </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> β, n (6.04%) </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> 5 </Td> <Td> 10 </Td> <Td> 15.031103 (24) </Td> <Td> 9.87 (7) ms </Td> <Td> β, n (93.6%) </Td> <Td> </Td> <Td> ​ ⁄ − </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> β (6.0%) </Td> <Td> </Td> </Tr> <Tr> <Td> β, 2n (0.40%) </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> 5 </Td> <Td> 11 </Td> <Td> 16.03981 (6) </Td> <Td> <190 × 10 s (<0.1 MeV) </Td> <Td> n </Td> <Td> </Td> <Td> 0 − </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> 5 </Td> <Td> 12 </Td> <Td> 17.04699 (18) </Td> <Td> 5.08 (5) ms </Td> <Td> β, n (63.0%) </Td> <Td> </Td> <Td> (​ ⁄ −) </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> β (22.1%) </Td> <Td> </Td> </Tr> <Tr> <Td> β, 2n (11.0%) </Td> <Td> </Td> </Tr> <Tr> <Td> β, 3n (3.5%) </Td> <Td> </Td> </Tr> <Tr> <Td> β, 4n (0.40%) </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> 5 </Td> <Td> 13 </Td> <Td> 18.05617 (86) #</Td> <Td> <26 ns </Td> <Td> n </Td> <Td> </Td> <Td> (4 −) #</Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> 5 </Td> <Td> 14 </Td> <Td> 19.06373 (43) #</Td> <Td> 2.92 (13) ms </Td> <Td> β </Td> <Td> </Td> <Td> (​ ⁄ −) #</Td> <Td> </Td> <Td> </Td> </Tr> </Table>

What is the most common isotope of boron
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