| BOHRIUM | Chemical element 107, produced artificially by bombarding bismuth- 209 with nuclei of chromium- 54 (7) |
| ASTATINE | Heaviest chemical element of the halogen group, produced artificially by bombarding bismuth with alpha particles (8) |
| MENDELEVIUM | Radioactive metallic element produced artificially by bombarding einsteinium with alpha particles |
| PLUTONIUM | Radioactive metallic element first produced in 1940 by bombarding uranium-238 with deuterium nuclei (9) |
| NOBELIUM | Radioactive metallic element artificially produced by bombarding curium with carbon ions (8) |
| DUBNIUM | Synthetic element produced by bombarding plutonium with neon ions whose symbol is Du (7) |
| ES | A radioactive transuranic element produced by bombarding plutonium with neutrons. |
| RUTHERFORDIUM | Chemical element 104, synthesised in 1969 by bombarding californium-249 with carbon-12 ions (13) |
| AMERICIUM | Radioactive metallic element synthesized by bombarding uranium or plutonium with neutrons; atomic no. 95 (9) |
| RUBY | Precious variety of the mineral corundum coloured red by the presence of chromium (4) |
| ELECTROPLATING | Coating with a fine layer of chromium, silver etc (14) |
| ISOMER | Atomic nucleus with a different energy state to other nuclei of the same atomic number (6) |
| ATOMIC | Weapon with great explosive power that results from splitting the nuclei of a heavy metal, _ bomb (6) |
| HOMUNCULUS | Tiny man capable of being produced artificially, according to Paracelsus (10) |
| SYNTHETIC | Made artificially by chemical reaction (9) |
| IRACUND | Mixture of Chromium, Iodine and Uranium is likely to explode |
| EMERALD | Traces of chromium give this beryl variety its green colour |
| ELECTRONS | Found in the nuclei of all atoms and discovered by J. J. Thomson, the lightest stable subatomic particles known (9) |
| HALFLIFE | In physics, the time required for 50 per cent of the atomic nuclei of a radioactive sample to decay (4-4) |
| NEUTRON | Subatomic particle evident in the nuclei of all known elements except hydrogen (7) |
