Chemical Compounds and Equations

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Across
  1. 3. The chemical formula for hydrogen
  2. 5. substances that react together and change during a reaction.
  3. 6. a neutral particle in the nucleus of an atom
  4. 10. the center of an atom made up of protons and neutrons
  5. 11. A type of molecule when the atoms are different elements
  6. 12. one- or two-letter designation of an element
  7. 14. the basic particle of the chemical elements
  8. 16. substances that are produced in the reaction
Down
  1. 1. force that holds atoms together
  2. 2. small number after the element symbol that tell the number of atoms.
  3. 4. negative charged particle in the electron cloud surrounding an atom
  4. 7. a chemical substance that cannot be broken down into other substances
  5. 8. positive charged particle in the nucleus of an atom
  6. 9. The chemical formula for water
  7. 13. a group of atoms bonded together
  8. 15. the chemical formula for oxygen