Chemistry Crossword

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Across
  1. 2. A substance that can't be broken down by chemical changed or or broken down; composed of atoms
  2. 4. The basic unit of an element
  3. 5. Determined by valence electrons
  4. 6. A subatomic particle with a negative charge
  5. 7. The group of non-metal elements that do not react with other elements
  6. 8. A subatomic particle with a neutral charge
  7. 10. A subatomic particle with a negative charge
  8. 11. One or more letters given to identify an element
  9. 12. The rows in a periodic table that organize elements based on their energy levels
  10. 13. The columns in a periodic table that organize elements based on their valence electrons
  11. 14. A particle that is formed when an element loses or gains an extra proton or electron
Down
  1. 1. The electrons located on the outer energy level
  2. 3. When two atoms come together to form a molecule
  3. 9. The center of an atom
  4. 10. A subatomic particle with a positive charge