Across
- 2. the 25th element on the periodic table
- 3. the inside of an atom containing protons and neutrons
- 4. the most recent element to be discovered
- 6. displayed on the periodic table
- 7. surname of the man who proposed the Law of Octaves
Down
- 1. famous russian chemist
- 3. makes up 70% of the air
- 5. sub-atomic particle with a negative charge