Science

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Across
  1. 2. found in the atom neutral
  2. 4. The horizontal rows of the periodic table
  3. 8. The vertical rows of a periodic table
  4. 11. element Na
  5. 12. found outside of the element negatively charged
  6. 13. a substance made from two or more different elements that have been chemically joined.
  7. 14. central core of an atom
  8. 15. a pure substance, found a chart
Down
  1. 1. found in the atom positive
  2. 3. the arrangement of electrons around the nucleus of an atom
  3. 5. a chemical element and its compounds in the natural state
  4. 6. basic unit of a chemical element
  5. 7. matter is any substance that has mass and takes up space
  6. 9. where the electrons are found
  7. 10. the result of combining two or more substances