Chemistry in Biology

1234567891011121314151617
Across
  1. 3. ________ bonds occur when electrons are shared
  2. 6. The neutral part of an atom
  3. 7. A pure substance that cannot be broken down by physical means
  4. 8. Are the process by which atoms or groups of atoms in substances are reorganized into different substances
  5. 10. The study of matter
  6. 13. A compound n which the atoms are held together by covalent bonds.
  7. 14. The positively charged part of an atom
  8. 15. The building blocks of matter
  9. 16. ____________ = Atoms
  10. 17. The result of a chemical reaction
Down
  1. 1. __________-12 is used to date substances that have once been alive
  2. 2. __________ Isotopes are broken down by radiation when the nucleus of an atom breaks up
  3. 4. Neutrons and Protons are located in the __________
  4. 5. Carbon ____________ happens when nitrogen becomes carbon through beta decay
  5. 9. Part of the atom located on the outside of the nucleus
  6. 10. ____________ bonds occur when electrons are shared
  7. 11. The beginning portion of a chemical reaction
  8. 12. Atoms of the same element that have the same number of protons and electrons but have a different number of neutrons