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.
Orlando shooting: 50 people dead after gunman opens fire at LGBT nightclub in Florida. The gunman behind a suspected terrorist attack that killed 50 people at an LGBT nightclub in Orlando is believed to be Omar Mateen, 29, from Florida, a US citizen of Afghan heritage. The gunman opened fire at the Pulse Club in the early hours of Sunday, taking hostages, killing many and injuring 53.