Chemistry in Biology

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