Chemistry in Biology

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Across
  1. 7. Part of the atom located on the outside of the nucleus
  2. 8. Atoms of the same element that have the same number of protons and electrons but have a different number of neutrons
  3. 10. The beginning portion of a chemical reaction
  4. 11. The result of a chemical reaction
  5. 14. ____________ bonds occur when electrons are shared
  6. 15. Carbon ____________ happens when nitrogen becomes carbon through beta decay
  7. 18. The study of matter
  8. 19. Neutrons and Protons are located in the __________
Down
  1. 1. A compound in which the atoms are held together by covalent bonds.
  2. 2. __________-12 is used to date substances that have once been alive
  3. 3. The positively charged part of an atom
  4. 4. The neutral part of an atom
  5. 5. A pure substance that cannot be broken down by physical means that contains more than one element
  6. 6. ____________ = Atoms
  7. 9. __________ Isotopes are broken down by radiation when the nucleus of an atom breaks up
  8. 12. ________ bonds occur when electrons are transferred
  9. 13. Are the process by which atoms or groups of atoms in substances are reorganized into different substances
  10. 16. A pure substance that cannot be broken down by physical means and found on a table
  11. 17. The building blocks of matter