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 police at the Pulse nightclub, where at least 50 people were killed this morning. (Getty) Early this morning, a gunman opened fire at the gay nightclub Pulse in Orlando, Florida, where there were around 300 people inside. The gunman, identified as Omar Mateen, was killed by a SWAT team at the scene, but not before at least 50 people were killed and 53 were injured. Police first said that at least 20 people were killed, but that number climbed to 49, reports The Orlando Sentinel. Police also said that 53 people were injured. The shooting has been described as terrorism and Orlando Mayor Buddy Dyer declared a state of emergency. The massacre is the worst mass shooting in U.S. history.