Across
- 4. Attraction between opposite electrical charges
- 8. 6.023x10-23
- 9. How many elements are in the human body
Down
- 1. Found in many proteins
- 2. Powerhouse of the cell
- 3. Specific quantity with a weight in grams
- 5. Simplest atom
- 6. Have a positive electrical charge
- 7. The unit used to express atomic mass