Across
- 4. 6.023x10-23
- 5. The simplest atom
- 7. To determine the number of atoms chemists use a unit called
- 8. Three protons, Three neutrons, and three electrons
- 9. Our bodies contain atoms of another 14 elements called
- 10. Unit used to express atomic mass
- 13. Symbol for sodium
- 14. Electrons occupy an orderly series of...
- 15. Found in many proteins
Down
- 1. Found in all organic molecules
- 2. The breakdown process
- 3. The outermost energy level forms the surface called
- 6. Attraction between opposite electrical charges
- 11. How many elements exist in nature
- 12. A cofactor for many enzymes