Chemistry in Biology

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