Chemistry

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Across
  1. 2. a type of nutrient that you get from your diet
  2. 5. an atom, molecule, or ion that has an unpaired valence electron
  3. 7. main source of energy for the body
  4. 9. an essential micronutrient which an organism needs in small quantities
  5. 10. elements on the earth and in foods that our bodies need to develop
Down
  1. 1. an ion with a positively charged carbon atom
  2. 3. a molecule or ion capable of donating a proton
  3. 4. carbon bears a formal negative charge
  4. 6. comprised of one or more long chains of amino acid residues
  5. 8. compound added to a system to cause a chemical reaction