Across
- 3. U
- 4. Xe
- 5. First two letters from McDonald
- 7. 40 atomic mass
- 8. Ne
- 12. Fe
- 14. 16 atomic mass
- 15. Opposite of last
- 16. Rhymes with Selenium
- 17. Atomic mass 207 times bigger than H
Down
- 1. 5 protons
- 2. Al
- 6. Only OG knows
- 9. Li
- 10. Represents money
- 11. Atomic number 30
- 13. Co