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.
Christina Grimmie, 22, shot in the head around 10.30pm Friday in Orlando. Was killed by Kevin James Loibl, 27, from St Petersburg, Florida, as police say it 'looks like' he was a deranged fan of the singer. Grimmie's brother Mark tackled Loibl, who then shot himself dead. Police say Loibl targeted Grimmie specifically in the attack, but did not know her personally.