Periodic Table

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Across
  1. 3. luster, good conductor of electricity and heat malleable
  2. 6. the number of electron in the outermost shell
  3. 7. Group 1, 1 electron in outer level
  4. 8. any of the gaseous elements helium, neon, argon, krypton, xenon, and radon
  5. 10. metallic elements in group 2 of the periodic table
Down
  1. 1. contains nonmetals,7 valence electrons in it's outermost energy level
  2. 2. dull poor conductor of electricity and heat brittle
  3. 4. Groups 3-12, 1-2 electrons in the outer energy level, less reactive
  4. 5. has properties of both nonmetals and metals can be shiny and dull
  5. 9. elements are arranged in order of increasing atomic number