Across
- 3. same number of valence electrons
- 8. a natural fuel
- 9. the collection of eight planets and their moons in orbit around the sun
- 11. photo used to see bones
- 12. atom particle with a neutral charge
- 13. dull, brittle, poor conductor
- 14. obscuring of the light from one celestial body by the passage of another between i
Down
- 1. an imaginary line about which a body rotates.
- 2. center of atom
- 4. the gelatinous liquid that fills the inside of a cell
- 5. a group of bonded atoms
- 6. a small rocky body orbiting the sun
- 7. nucleic acids angiotensin found in the nucleus
- 10. a resistance to an object or surface