Across
- 3. has symbol Mn, A hard, brittle, silvery metal.
- 4. Discovered in 1803 by William Hyde Wollaston
- 8. A soft, highly reactive metal.
- 9. A soft, silvery-white alkali metal.
- 10. An extremely radioactive element found by Joint Institute for Nuclear Research
Down
- 1. Discovered by the French chemist Paul-Émile in 1875
- 2. softest metal that is not an alkali metal.
- 5. usually in combination with sulfur and metals
- 6. In H20, First element
- 7. lustrous, hard-brittle, grayish-white and similar in appearance to silicon.