Chemistry in Biology

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