Chemistry in Biology

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