Chemistry in Biology

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