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Across
  1. 4. How easily a substance reacts chemically
  2. 6. The Distance between the nucleus and the outer shell
  3. 8. A negative charged sub-atomic particle
  4. 9. The amount of protons and electrons
  5. 12. Metal getting shaped into something new without breaking
  6. 14. The columns in a periodic table arranged by Valence Electrons
  7. 15. Represents elements with 1 or 2 letters
  8. 19. A table that arranges elements by periods and groups
  9. 23. Material being stretched out while keeping its strength.
  10. 24. Metallic elements with Valence Electrons in 2 shells
  11. 25. the electrons on the outermost shell
  12. 26. Is the control center of an atom.
Down
  1. 1. 6 chemically related elements
  2. 2. A positive charged sub-atomic particle
  3. 3. the number of atoms in a single molecule of an element
  4. 5. The sum of protons and neutrons
  5. 7. A neutral charged sub-atomic particle
  6. 10. The rows in a periodic table, arranged by energy levels
  7. 11. The space around the nucleus
  8. 13. Found inside of an atom.
  9. 16. Charge Protons minus electrons in NON-NEUTRAL atoms
  10. 17. Shells in the Electron Cloud
  11. 18. The elements that make up the 18th group
  12. 20. The measure of Atomic Mass
  13. 21. The smallest particle in an element
  14. 22. The purest form of a substance