Isotopes of boron

Boron (B) naturally occurs as isotopes, ¹⁰B and ¹¹B, 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 ⁸B, with a half-life of only 770 milliseconds (ms) and ¹²B 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 ⁷B, with a half-life of 150 yoctoseconds (ys). Those isotopes with mass below 10 decay into helium (via short-lived isotopes of beryllium for ⁷B and ⁹B) while those with mass above 11 mostly become carbon.

Contents

• Notes
• Boron 10
• References

Relative atomic mass: 10.811(7)