The Periodic Table

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Across
  1. 3. positively charged particle inside the nucleus
  2. 4. positively charged center of an atom
  3. 7. The nine basic groups of elements shown in the periodic table. They are the alkali metals, alkaline earth metals, transition metals, other metals, metalloids, non-metals, halogens, noble gases and rare earth elements.
  4. 8. arrangement of elements into families and rows
  5. 10. the number of protons in an atom's nucleus
Down
  1. 1. uncharged particle inside the nucleus
  2. 2. the number of protons plus the number of neutrons
  3. 5. abbreviation for an element's name
  4. 6. The seven rows in the table
  5. 9. negatively charged particles that surround the nucleus