Radioactive isotope. Radioactive isotope, also called radioisotope, radionuclide, or radioactive nuclide, any of several species of the same chemical element with different masses whose nuclei are unstable and dissipate excess energy by spontaneously emitting radiation in the form of alpha, beta, and gamma rays. 1  A brief treatment of radioactive isotopes follows.
BLM sympathizer Markeith Loyd (Orlando cop killer) caught. Posted on 17 January 2017. BLM sympathizer Markeith Loyd (Orlando cop killer) has finally been caught. Living about five miles away from where he killed one cop and was indirectly responsible for a second copâs it took this long to find the gangbanger thug.
The United States suffered one of the worst mass shootings in its modern history when 49 people were killed and 58 injured in Orlando, Fla., after a gunman stormed into a packed gay nightclub. The gunman was killed by a SWAT team after taking hostages at Pulse, a popular gay club. He was preliminarily identified as 29-year-old Omar Mateen.