Periodic Table and Subatomic Particles

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Across
  1. 5. The energy levels where electrons orbit the nucleus
  2. 10. Negatively charged subatomic particle
  3. 11. Positively charged subatomic particle found in the nucleus.
  4. 12. The horizontal rows on the periodic table are called ______.
  5. 13. These metals are found in the center of the periodic table
  6. 14. The total number of protons and neutrons in the nucleus of an atom is called the atomic ____.
Down
  1. 1. The element with atomic number 1
  2. 2. The 17th group on the periodic table
  3. 3. Alkali metals are in this group
  4. 4. The number of protons in an atom's nucleus is its ______ number.
  5. 6. Subatomic particle with no charge.
  6. 7. The vertical columns on the periodic table.
  7. 8. Name of the element with the atomic number of 6
  8. 9. The 18th group on the periodic table