Periodic table

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Across
  1. 2. the number of protons in the nucleus
  2. 3. the vertical column in which the elements are grouped.
  3. 6. member of the carbon group,(group 14)
  4. 7. in the d-block of the periodic table, this means that their highest energy subshell is always a d
  5. 10. a member of the nitrogen group of elements
  6. 13. on the left of the periodic table
  7. 14. on the left of the noble gases on the periodic table
  8. 15. the first column of the periodic table
Down
  1. 1. A small group of elements whose members touch the zigzag line
  2. 4. a row of chemical elements
  3. 5. element a temporary name that is based on the atomic number as a root
  4. 8. on the right side toward the upper right corner.
  5. 9. the average mass of the protons, neutrons, and electrons in an atom.
  6. 11. the far right of the periodic table and were previously referred to as the inert gases
  7. 12. a column of elements in the periodic table