Across
- 2. a cluster in the center of a atom
- 5. change one substance added to another to create new form
- 7. a hydrogen particle
- 8. a particle found in the nucleus of all atoms
- 10. characteristics of of an element
- 11. two or more elements
- 12. two or more atoms
- 14. acid group of organic acids in living cells
- 15. compound member of large class which has to have carbon
Down
- 1. a responds to a stimulus
- 3. group of naturally occurring molecules
- 4. compound containing carbon, hydrogen, and oxygen
- 6. a particle with a negative charge
- 8. change changes in shape, size, color, and volume
- 9. chemical elements between metals and nonmetals
- 10. table display of chemical elements
- 13. any of the four substances
- 16. a unit of matter