electron configuration

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Across
  1. 3. the name of the rows on the periodic table
  2. 5. the periodic table is made up of metals non-metals and
  3. 6. a metal atom loses this to become positively charged
  4. 8. the number of electrons in the outer shell of noble gases
  5. 10. the maximum number of electrons in the first shell
  6. 11. the name of the outer shell of atoms
  7. 13. the type of compounds formed when metals react with non-metals
  8. 15. the atomic number of Sodium
Down
  1. 1. this element has the atomic mass of 14.007
  2. 2. non-metals do this with electrons to achieve the octet arrangement
  3. 4. positive ions attract this type of ion
  4. 7. having this in the outer shell makes atoms stable
  5. 9. the name of the vertical columns on the periodic table
  6. 12. C is the symbol for this element
  7. 14. alkaline metals belong to this group