Unit 2

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Across
  1. 4. Process in which one or more substances, also called reactants, are converted to one or more different substances, known as products.
  2. 9. The surface or material on or from which an organism lives, grows, or obtains its nourishment.
  3. 10. The complete transfer of valence electron(s) between atoms.
  4. 14. Attraction and repulsions between atoms, molecules, as well as other intermolecular forces
  5. 15. The smallest part of a substance that cannot be broken down chemically
  6. 18. Any atom or group of atoms that bears one or more positive or negative electrical charges.
  7. 20. Contains protons, neutrons, and electrons.
  8. 21. A stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
  9. 22. A subatomic particle that is found in all atoms with no charge.
  10. 25. Molecule that has a charge on one side, that is not cancelled out.
  11. 27. The structure in a cell that contains the chromosomes.
  12. 28. A substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.
  13. 30. Atoms with the same number of protons but different numbers of neutrons
Down
  1. 1. A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
  2. 2. The energy barrier that must be surmounted for a chemical reaction to occur.
  3. 3. A substance that takes part in and undergoes change during a reaction.
  4. 5. A subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
  5. 6. A weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.
  6. 7. The minimum energy required for a reaction to occur.
  7. 8. An enzyme that is responsible for oxidizing ethanol and converting it into (NADH)
  8. 11. These molecules are bonded together by a shared pair of electrons, which forms the strong covalent bond.
  9. 12. A region on an enzyme that binds to a protein or other substance during a reaction.
  10. 13. The liquid in which a solute is dissolved to form a solution.
  11. 16. An enzyme which breaks down proteins and peptides.
  12. 17. The minor component in a solution, dissolved in the solvent.
  13. 19. A substance made from two or more different elements that have been chemically joined
  14. 23. An enzyme, found chiefly in saliva and pancreatic fluid, that converts starch and glycogen into simple sugars.
  15. 24. A liquid mixture in which the minor component is uniformly distributed within the major component
  16. 25. A measure of how acidic or basic a substance or solution is
  17. 26. An enzyme that breaks down fatty acids
  18. 29. End substances after a biological process has occurred