Biology Ch. 6

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Across
  1. 6. Compound in which the atoms are held together by covalent bonds
  2. 8. An Electrical attraction between two oppositely charged atoms or groups of atoms called ions
  3. 10. Particles that have no charge
  4. 13. Building blocks of matter
  5. 14. Substance that lowers the activation energy needed to start a chemical reaction
  6. 15. The substances formed during the reaction
Down
  1. 1. The process by which atoms or groups of atoms in substances are reorganized into different substances
  2. 2. Center of the atom
  3. 3. Pure substance that cannot be broken
  4. 4. Positively charged particles
  5. 5. Chemical bond that forms when electrons are shared
  6. 7. Negatively charged particles
  7. 8. An atom that has lost or gained one or more electrons
  8. 9. Atoms of the same element that have different numbers of neutrons
  9. 11. The starting substances
  10. 12. Pure substance formed when two or more different elements combine