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.
(CNN)Here's a timeline of the deadliest mass shooting in U.S. history, when a gunman killed 49 people and wounded 53 in the early morning hours of June 12 at Pulse nightclub in Orlando. This timeline is based on information provided by Orlando police Chief John Mina, SWAT Captain Mark Canty, Mayor Buddy Dyer, first responder dispatch, witness accounts, the FBI and other law enforcement authorities.