| ACTINIUM | Power can, I hesitate, be a radioactive metallic element (8) |
| THORIUM | Named after the Norse god of thunder, a radioactive metallic element, atomic number 90 (7) |
| URANIUM | A radioactive metallic element |
| NOBELIUM | Radioactive metallic element artificially produced by bombarding curium with carbon ions (8) |
| ADOPTING | Taking on a party with power can get gruelling initially (8) |
| FRANCIUM | If rum can be redistilled it may become a radioactive element (8) |
| ASTATINE | A radioactive element, the heaviest in the halogen group (8) |
| TALFLSFE | Time taken for half the atoms of a radioactive sample to decay (8) |
| HALFLIFE | Time taken for half the atoms of a radioactive sample to decay (8) |
| PLUTONIUM | A highly toxic, radioactive metallic element (9) |
| RADIUM | Name a naturally occurring radioactive metallic element (6) |
| VANADIUM | Lead - a radioactive element? Not lead, it's a metallic element (8) |
| ASPS | A fool holding power can be extremely dangerous (4) |
| PROTACTINIUM | Radioactive metallic element of the actinide series occurring as a decay product of uranium; atomic no. 91 (12) |
| CALIFORNIUM | Radioactive metallic element; symbol Cf (11) |
| FERMIUM | Radioactive metallic element of the actinide series, atomic no 100 (7) |
| RA | An intensely radioactive metallic element that occurs in minute amounts in uranium ores |
| MENDELEVIUM | Radioactive metallic element produced artificially by bombarding einsteinium with alpha particles |
| TECHNETIUM | Radioactive metallic element of the transition series produced by deuteron bombardment of molybdenum (1O) |
| NEPTUNIUM | Radioactive metallic element, atomic no. 93 (9) |
