Atoms/Periodic Table Review

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Across
  1. 4. a nonmetal with 7 valence electrons in Period 3
  2. 7. element with 1 valence electron in Period 5
  3. 9. an element with 3 electron shells in Group 18 (Noble gas)
  4. 10. an element in Period 2 with 8 valence electrons
  5. 12. an element with 3 electron shells and 1 valence electron (group 1)
Down
  1. 1. a metalloid with 5 valence electrons (group 15)
  2. 2. an element in Group 2, Period 4
  3. 3. a metalloid with 3 valence electrons
  4. 5. an non metal element with an atomic mass of 14
  5. 6. a metal with an atomic number of 47
  6. 8. an element with 12 protons
  7. 11. a nonmetal with 1 valence electron (group 1)
  8. 12. a metalloid with 14 protons, electrons, and neutrons