Chemistry

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Across
  1. 3. Names of all gas elements
  2. 5. Involve the combination of smaller atoms or molecules into larger molecules
  3. 7. Copper Sodium
  4. 8. Na and S
  5. 10. Substance formed by a metal and a non-metal
  6. 13. A compound that separates into ions when it dissolves in water
  7. 16. positive charge, heavy mass
  8. 17. Have more than one charge
  9. 18. Substance formed by two non-metals
  10. 19. neutral, heavy mass
Down
  1. 1. The space that an electron can travel in
  2. 2. Metals and Non-metals combine to form this
  3. 4. A model that the number of electrons in the outside of an atom
  4. 6. Groups of elements in the same vertical column
  5. 9. Fast reaction of a substance with oxygen to produce oxides
  6. 10. A model that shows the number of protons, electrons, and neutrons in an atom of each element
  7. 11. Describes what a substance does when it changes into one or more substances
  8. 12. A negatively charged atom
  9. 14. Highly reactive metals
  10. 15. Electrons in the outer shell of an atom