Chemistry in Biology

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