Chemistry in Biology

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