Chemestry in Biology

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Across
  1. 2. The building block of matter made up of a nucleus and electron cloud.
  2. 7. The elements mixed together to form a new substance.
  3. 8. Biological catalyst found in livign organisms.
  4. 9. The table we look at while classifying elements.
  5. 10. Atoms of the same element that have the same number of protons and electrons but a different number of neutrons.
  6. 12. Chemical bond that forms when electrons are shared.
  7. 13. The negative charge particle of an atom.
  8. 15. The particle of an atom that has no charge or is neutral.
  9. 17. The element found in almost all livign organisms.
  10. 19. The horizontal rows on the periodic table.
  11. 21. A pure substance formed when two or more different elements join/bond together chemically.
  12. 22. A mixture that has a uniform composition throughout.
  13. 23. Substance that lowers activation energy.
  14. 25. Anything that has mass or weight.
Down
  1. 1. is the substance beign disolved in another substance.
  2. 3. A combination of two or more pure substances that are not chemically cobined.
  3. 4. A mixture where the components remain distinct.
  4. 5. A pure substance that cannot be broken down into other substances by physical or chemical means.
  5. 6. The minimum amount of energy needed for a chemical reaction to take place.
  6. 11. The substances formed form reactants.
  7. 14. Bond that forms when an electron is donated to the other atom.
  8. 16. The particle of an atom with a positive charge.
  9. 18. A mixture that appears to be a single substance.
  10. 20. The vertical rows on the periodic table.
  11. 21. The study of matter.
  12. 24. The substance in which the solute is dissolved.