Editing Boron group (section)

===Nuclear===
With the exception of the synthetic nihonium, all of the elements of the boron group have stable [[isotopes]]. Because all their [[atomic number]]s are odd, boron, gallium and thallium have only two stable isotopes, while aluminium and indium are [[monoisotopic element|monoisotopic]], having only one, although most indium found in nature is the weakly radioactive <sup>115</sup>In. <sup>10</sup>B and <sup>11</sup>B are both stable, as are <sup>27</sup>Al, <sup>69</sup>Ga and <sup>71</sup>Ga, <sup>113</sup>In, and <sup>203</sup>Tl and <sup>205</sup>Tl.<ref>{{cite book |title= The Group 13 Metals Aluminium, Gallium, Indium and Thallium: Chemical Patterns and Peculiarities |last1= Aldridge |first1= Simon |first2=Anthony J.|last2=Downs|first3=Tony|last3=Downs |year= 2011 |publisher= John Wiley & Sons |page= ii|url= https://books.google.com/books?id=0AazLrNPoMEC|isbn= 978-0-470-68191-6}}</ref> All of these isotopes are readily found in macroscopic quantities in nature. In theory, though, all isotopes with an [[atomic number]] greater than 66 are supposed to be unstable to [[alpha decay]]. Conversely, all elements with atomic numbers are less than or equal to 66 (except Tc, Pm, Sm and Eu) have at least one isotope that is theoretically energetically stable to all forms of decay (with the exception of [[proton decay]], which has never been observed, and [[spontaneous fission]], which is theoretically possible for elements with atomic numbers greater than 40).

Like all other elements, the elements of the boron group have radioactive isotopes, either found in [[trace radioisotope|trace]] quantities in nature or produced [[Chemical synthesis|synthetically]]. The longest-lived of these unstable isotopes is the [[isotopes of indium|indium isotope]] <sup>115</sup>In, with its extremely long [[half-life]] of {{nowrap|4.41 × 10<sup>14</sup> y}}. This isotope makes up the vast majority of all naturally occurring indium despite its slight radioactivity. The shortest-lived is <sup>7</sup>B, with a half-life of a mere {{nowrap|350±50 × 10<sup>−24</sup> s}}, being the [[isotopes of boron|boron isotope]] with the fewest neutrons and a {{not a typo|half-life long}} enough to measure. Some radioisotopes have important roles in scientific research; a few are used in the production of goods for commercial use or, more rarely, as a component of finished products.<ref>[[#Downs1993|Downs]], pp. 19–24</ref>