Across
- 5. element used as a weapon in world war 1
- 6. what type of bond is formed when electrons are shared
- 7. action that draws water out of roots into stems of plants
- 8. structure that results when atoms are bonded together
- 11. the basic unit of life is?
- 12. a substance formed by chemical combinations
- 13. positively charged particle found in the nucleus
- 14. particle found in nucleus with no charge
- 15. type of bond formed when electrons are transferred
Down
- 1. process of liquid turning into vapor
- 2. what is the center of the atom called?
- 3. positively or negatively charged atoms
- 4. attraction between molecules of different substances
- 9. negatively charged particle found in the nucleus
- 10. process of vapor turning into liquid