Periodic table

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Across
  1. 3. the image or letters to find an element
  2. 6. an area outside the nucleus where electrons can be found
  3. 7. the number of neutrons combined inside an atom
Down
  1. 1. a cluster of the same atom to make up something
  2. 2. Property of an element that you use your senses to observe
  3. 4. a chemically charged element
  4. 5. the number of protons inside an atom