Chemistry in Biology

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