Across
- 4. another name for an inorganic salt
- 6. this ion is important for muscle contraction, blood clotting, and bone structure
- 9. a molecule made of two or more different atoms
- 10. most abundant ion in intracellular fluid
- 12. Na+
- 13. proteins are made of chains of these molecules
- 14. compounds without carbon atoms
- 16. as a free ion, ________ makes substances more acidic
- 17. fats
Down
- 1. the compound comprised of 2 hydrogen atoms plus 1 oxygen atom
- 2. nucleic acids differ from proteins because they include these atoms
- 3. a molecule made from identical atoms
- 5. a substance with a pH below 7
- 7. charged atoms or molecules
- 8. a simple sugar
- 11. a synonym for basic
- 15. small, invisible units of energy that make up all elements