Chemistry

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Across
  1. 3. The smallest unit of a chemical compound
  2. 4. The vertical lines of the Periodic Table
  3. 8. The element's electrons on the outer rim
  4. 9. The number that tells how much an atom in the element weighs
  5. 10. The way that elements are organized in their groups
Down
  1. 1. The horizontal rows on the Periodic Table
  2. 2. This rule states that an element has to have 8 valence electrons to make a chemical bond
  3. 5. Elements that can be found on the left/middle of the Periodic Table
  4. 6. The number that tells how many protons an element has
  5. 7. Elements that can be found on the right side of the Periodic Table