Unit 4 Crossword

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Across
  1. 7. This element has the largest atomic radius of the alkaline earth metals.
  2. 9. This element has the highest ionization energy in period 4.
  3. 11. This element has the smallest ionization energy in the period with electrons in the third energy level.
  4. 13. This element is named after the “father of the periodic table.”
  5. 15. This element is the halogen in period 5.
  6. 18. The only metal that is a liquid at room temperature
  7. 20. This is the least electronegative element with four occupied energy levels (least other than the Noble Gas)
  8. 21. This element has the highest ability to pull electrons of neighboring atoms.
  9. 22. This element is a semiconductor in period four and is in the same family as Carbon.
  10. 23. This element has six valence electrons in the fourth energy level.
  11. 24. This element has the highest melting point on the periodic table at 3,422 deg C/6,192 deg F
  12. 25. This element has the largest ionization energy of the alkali metals.
Down
  1. 1. This rare radioactive element is NOT named after Pennsylvania.
  2. 2. This element is a metal in period 3 that touches the “stairstep”
  3. 3. This is the noble gas with the least occupied energy levels.
  4. 4. This element is not an Alkali metal but has one valence electron
  5. 5. The only nonmetal that is a liquid at room temperature
  6. 6. This element is in period 5 and is a stable, non-reactive gas.
  7. 8. This is the metalloid located in period 3.
  8. 10. This element is in period 5 and the group that forms +1 ions
  9. 12. This element forms an ion with a charge of -2 and its valence electrons are found in the third energy level.
  10. 14. Ms. Doherty’s favorite element; the solid (freezes at -219 deg C/-361 deg F) is a light sky blue color; the electron transport chain would not work without it
  11. 16. This element makes up 78% of the air we breathe and has an electron configuration of [He]2s22p3
  12. 17. The most reactive metal in period 6.
  13. 19. A neutral atom of this element has 24 total electrons.