Across
- 1. two or more elements
- 4. Gauseuas elements
- 5. releasing energy
- 7. chemical substance
- 8. chemical consumed to make a product
- 9. amount of mass remains the same
- 16. positive charge
- 17. horizontal lines
- 18. negative charge
- 20. typically hard, opaque and shiny
- 21. neutral charge
- 23. product of a chemical reaction
- 24. columns
Down
- 2. creator of the periodic table of elements
- 3. outer electrons (two words)
- 6. a group of atoms
- 10. number of electrons in an element
- 11. absorbing energy
- 12. name of a superheroe
- 13. lacks metallic features
- 14. has metal and non-metal features
- 15. abbreviation for an element
- 19. the center
- 22. "ring"
- 23. thin coating