Chemistry in Biology

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