Across
- 4. #1 energy source for cells
- 6. Strongest chemical bond (plural)
- 8. Pure form of matter
- 14. An atom's ability to attract electrons in a bond
- 16. Number of protons
- 17. The capacity to do work
- 19. Middle chemical bond (plural)
- 20. Same element, different number of neutrons
- 21. Surround nucleas and has negative charge
- 22. stored energy in electrons
Down
- 1. Positive charge
- 2. Building blocks of nucleic acids
- 3. A liquid that dissolves other substances
- 5. energy in motion
- 7. Weakest chemical bond (plural)
- 9. Composed of protiens (plural)
- 10. Building block of living things
- 11. Attractive forces holding atoms together
- 12. Anything that has mass and occupies space
- 13. Neutral charge
- 15. Number of proton & neutrons
- 18. Unstable isotopes