Across
- 3. What is column 17?
- 5. What kind of element is Helium?
- 6. What is another word for columns?
- 8. The amount of protons is equal to the what?
- 13. All elements have protons neutrons and what?
- 14. How many protons does boron have?
- 16. What element has the atomic mass of 1.008?
- 18. What is hydrogen?
- 19. Weighted average of mass of an element?
Down
- 1. What is another name for rows?
- 2. What is column 1?
- 4. What is column 2?
- 7. What element has the symbol S?
- 9. Columns 3-12 are what kinda of metals?
- 10. Who created the Periodic Table?
- 11. What is column 18?
- 12. What are the vertical lines called?
- 13. What is oxygen?
- 15. What are the horizontal lines called?
- 17. AU is what for Gold?