| Answer | Crossword Clue |
|---|---|
| calcium | The chemical element of atomic number 20, a soft gray metal |
| aluminum | The chemical element of atomic number 13, a light silvery-gray metal |
| zirconium | The chemical element of atomic number 40, a hard silver-gray metal of the transition series |
| molybdenum | The chemical element of atomic number 42, a brittle silver-gray metal of the transition series, used in some alloy steels |
| gadolinium | The chemical element of atomic number 64, a soft silvery-white metal of the lanthanide series |
| dysprosium | The chemical element of atomic number 66, a soft, silvery-white metal of the lanthanide series |
| thallium | The chemical element of atomic number 81, a soft silvery-white metal that occurs naturally in small amounts in pyrite and other ores. Its compounds are very poisonous |
