Across
- 5. rule that the cloud needs eight electrons
- 6. molecules are spread out
- 9. shows number of atoms in a compound
- 10. formulas to the left of the arrow
- 12. big number in front of chemical formula
- 15. two or more elements bonded together
- 16. pure substance located on the periodic table
- 18. when atoms rearrange to form a new substance
- 20. shows reactants forming products
- 21. molecules slide past each other
- 22. small number on the bottom of the formula
Down
- 1. electrons located in the outermost shell
- 2. determines the element's identity (two words)
- 3. two or more elements bonded together may be same or different
- 4. positively charged particle
- 7. molecules are tightly packed
- 8. things formed after a chemical reaction
- 11. located in center of atom
- 13. neutral charged particle
- 14. rows on the periodic table
- 15. area outside the nucleus
- 17. columns on the periodic table
- 19. negatively charged particle