1382. What is a radioactive substance? // Irradiated vs. contaminated // Alpha particles, beta, gamma rays, neutrons, kryptonite November 21st, 2009 by reuben in radiation Back Top Tags: card 1381. Types of injury in a nuclear explosion // Radon toxicity affects what organ primarily? // Ionizing vs. nonionizing radiation 1383. Effects of various radiation doses, LD50, nonsurvivable dose // Early organs affected in acute radiation syndrome // Most sensitive early indicator Leave a Reply Cancel reply Please post any discussion to the emupdates Reddit page.