| URANIUM | This element, whose isotopes are used as fuel in nuclear reactors and nuclear weapons, was discovered by German chemist Martin Heinrich Klaproth in 1789. One pound of this material yields as much ener |
| PLUTONIUM | Element whose isotopes are used as fuel in certain types of nuclear reactors and as an ingredient in nuclear weapons. It was first detected in 1941 by American chemists Glenn T. Seaborg, Joseph W. Ken |
| RADIUM | Chemical element, atomic number 88, whose isotopes are radioactive (6) |
| HYDROGEN | Chemical element whose three natural isotopes are protium, deuterium and tritium (8) |
| KEROSENE | Oil used as fuel in lamps and heaters (8) |
| THORIUM | Radioactive metal of the actinide series whose isotope 232 is used as a nuclear power source; atomic no. 90 (7) |
| SNOWBALLFIGHT | Missile attacks in this global warfare and nuclear fallout starts to spread (8,5) |
| BORON | Chemical element used for shielding in nuclear reactors (5) |
| NEPTUNIUM | Radioactive metallic element of the actinide series produced by neutron bombardment of uranium in nuclear reactors (9) |
| REACTOR | Care about the hill where radioactive isotopes are produced |
| DURING | In front of both reactors and incinerators, waste bags |
| ARTHURCOMPTON | US physicist and Nobel Laureate (1927, with Charles Wilson) noted for his research on X-rays, and nuclear energy (6,7) |
| NUCLEARWASTE | A byproduct from radioactive reactors and fuel processing plants (7,5) |
| LANCE | Which long, shafted weapon, was used by mounted soldiers in charging (5) |
| LASER | The technology for this light-ray weapon was developed in the Sixties |
| GREENPEACE | Environmental group with high profile campaigns to end commercial whaling and nuclear testing |
| ISOTOPES | I call for help carrying most important electronic and nuclear materials (8) |
| SHRAPNEL | Sawn-off projectile filled with charge and nuclear particles for dispersal (8) |
| MAGNOX | Alloy used in nuclear reactors |
| MODERATOR | Substance used to slow down neutrons in nuclear reactors (9) |
