chemistry

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Across
  1. 2. a macromolecule formed when monomers join together
  2. 3. a positively or negatively charged atom
  3. 7. a negatively charged subatomic particle
  4. 8. the basic unit of an element
  5. 11. a substance formed from the combination of two or more elements
  6. 12. change nothing new or different is formed
  7. 13. a compound that produces hydroxide ions in solution
Down
  1. 1. a process that changes one set of chemicals into another
  2. 4. an atom that differs in the number of neutrons from other atoms of the same element
  3. 5. an atom is the smallest part of this
  4. 6. a positively charged subatomic particle
  5. 9. number protons plus neutrons
  6. 10. the center of an atom
  7. 14. a compound that forms hydrogen ions in solution