Across
- 1. Early 1900's Protons and electrons
- 4. New substance formed between 2 reactants
- 5. Group 1, unique element
- 8. 18 columns
- 10. Group of atoms acting as one
- 15. defines how many protons an element has
- 16. Made up of one type of substance
- 20. 1898-1907 British scientist
- 24. Early 1900's electron shells
- 26. In between non-metals/metals
Down
- 2. 1904 planetary model
- 3. Greek word- to go or wander
- 4. 7 rows
- 6. Made up of two or more substances
- 7. When a non-metal and metal combine
- 9. Most stable non-metals
- 11. Chemical combination of two or more elements
- 12. When two non-metals combine
- 13. Most reactive metals
- 14. Anything on the periodic table
- 17. 1808 Billiard ball model
- 18. The average mass of an element
- 19. 1847 raisin bun model
- 21. Represents the number of atoms in a chemical formula
- 22. 2 or more substances that form a product
- 23. Mixture of 2 or more substances that look like one
- 25. Most reactive non-metals