Chemistry in Biology

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