Chemistry

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Across
  1. 3. mass Weight of element
  2. 5. Vertical columns on the periodic table
  3. 10. Dull, poor conductors, not reactive, gas
  4. 13. Abbreviation of Element
  5. 14. Made first periodic table of elements
  6. 16. Ingredients before reaction
  7. 18. Has positive charge
  8. 19. Has neutral charge
  9. 21. The number of atoms before and after a reaction are the same
  10. 24. Horizontal rows on the periodic table
  11. 25. Substance in simplest form
  12. 26. The center of an atom
Down
  1. 1. Electrons in the outermost layer
  2. 2. A reaction when heat is created
  3. 4. Two or more elements put together
  4. 6. Has negative charge
  5. 7. Ingredients produced after a reaction
  6. 8. Space outside of the nucleus
  7. 9. Form of matter that cannot be further broken down
  8. 11. Non-Reactive, stable
  9. 12. Have properties of metals and nonmetal
  10. 15. Creation of a solid
  11. 17. A reaction when heat is absorbed
  12. 20. Suggested that electrons move from one orbital to the other in large steps
  13. 22. Group of atoms linked together
  14. 23. Shiny, conductor, reactive, solid