Chemistry in Biology

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