Across
- 2. atomic number of carbon
- 6. nitrogen and oxygen
- 9. the atoms that make up the new substance
- 11. chemical equation uses symbols/formulas to show:
- 12. form of matter made up of one type of atom
- 13. form of matter made up of 2 or more different atoms
- 15. oxygen,silicon, aluminum & iron
- 18. Na, S, and O are examples of:
Down
- 1. atoms are not created or destroyed
- 2. number that is written just below the symbol
- 3. negative charge in atom
- 4. oxygen, carbon,nitrogen, hydrogen
- 5. atomic mass of sodium
- 7. center of atom that contains protons and neutrons
- 8. are formed with electrons
- 10. neutral charge in atom
- 12. oxygen, hydrogen, chlorine, sodium
- 14. positive charge in atom
- 16. the atoms that make up the original substance
- 17. compounds are represented by: