Isotopes of neon
possesses three stable isotopes, 20Ne, 21Ne, and 22Ne. In addition, 17 radioactive isotopes have been discovered ranging from 15Ne to 34Ne, all short-lived. The longest-lived is 24Ne with a half-life of 3.38 minutes. All others are under a minute, most under a second. The least stable is 15Ne with a half-life of 7.7×10−22 s. See isotopes of carbon for notes about the measurement.
