Periodic Table Puzzle (Golan, Dajae, Merrick)

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123456789101112131415161718
Across
  1. 4. Used with copper or nickel to form alloys to make springs; has 2 valence electrons
  2. 7. Has an ionic radius of 27pm; only nonmetal in group 13 of the periodic table
  3. 11. Has the least mass of any element on the periodic table
  4. 14. Atomic radius of 0.143nm, a metal, 3 valence electrons, a light weight chemical element, silvery white metal, the most about metallic element in earth's crust
  5. 15. Ionization energy is 12,9676, it was named after the Greek word ¨chloros,” mostly used for bleaching
  6. 16. Nonmetal, 2.19 electronegativity, It forms the sugar-phosphate backbone of DNA and RNA
  7. 17. Most stable element on the periodic table; almost always in a gaseous state
  8. 18. Has a charge of 0, provides an inert atmosphere in which welded metals will not oxidize
Down
  1. 1. 4 valence electrons, used in gloves and other supplies
  2. 2. Mass is 32.066, protons,neutrons and electrons are all 16 it is used to make two of the essential amino acids needed to make proteins
  3. 3. Has the second highest atomic mass of the 3 Noble gases part of elements 1-18.
  4. 5. Electronic configuration is [Ne] 3s^2
  5. 6. Used as a component in rechargeable batteries; has a charge of +1
  6. 8. Has 6 valence electrons, located in the 2nd row
  7. 9. Has the unique ability to form long, strongly-bonded chains; has a charge of +4
  8. 10. Has an atomic mass of 22.99
  9. 12. Has 7 Protons
  10. 13. Has the highest electronegativity on the periodic table; the 13th most abundant element in the Earth's crust