Chemistry in Biology

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