Across
- 1. the smallest particle of a chemical element
- 3. the least amount possible
- 5. a span of time or a timeframe
- 10. not metal
- 12. a thing that represents something else
- 14. the information center of the cell
- 15. a group of atoms bonded together
- 16. power derived from the use of resources
- 18. the spreading of somethin more widely
Down
- 2. a solid material good with electrical conductivity
- 4. a stable subatomic particle
- 6. another name for nucleon number
- 7. the process of unconscious thought
- 8. number of chemical elements
- 9. an admixture of metals
- 11. any element in group VIIA of the periodic table
- 13. an essential part of something
- 15. anything that occupies space
- 17. a number of things located together