Periodic Table Trends

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Across
  1. 3. are all elements in group 1 of the periodic table (except for hydrogen)
  2. 6. the ability to attract electrons within a compound
  3. 11. these are very reactive atoms found in group 2 of the periodic table
  4. 12. the size of a neutral atom
  5. 15. to bend easily and have the ability to be hammered flat
  6. 17. energy required to remove an electron to form an ion
  7. 19. Number of protons in hydrogen-3
  8. 20. which element is more reactive; K or Fe?
  9. 23. these elements have a full octet and therefore do not readily react with other atoms
  10. 25. the ____________ together the charges are, the greater the effective nuclear charge
  11. 26. meaning to break when hammered
  12. 27. these elements touch the staircase line and are semiconductors
Down
  1. 1. adding an electron creates a ___________ ion
  2. 2. outer shell electrons
  3. 4. these lie to the left of the staircase line - are shiny and conduct electricity
  4. 5. the most common element in the universe
  5. 7. the ability to be pulled into a wire
  6. 8. number of protons and neutrons in hydrogen-3
  7. 9. a charged particle
  8. 10. which has a smaller ionic radius? Br or Ni?
  9. 13. this is the most electronegative element on the periodic table
  10. 14. elements found in group 17 of the periodic table - the most reactive nonmetals
  11. 16. a negative ion (gain of electrons)
  12. 18. the vertical columns on the periodic table (tell us the number of valance electrons)
  13. 21. lie to the right of the staircase line - are dull and do not conduct electricity well
  14. 22. the horizontal rows on the periodic table (tell us the number of electron shells)
  15. 24. removing an electron creates a ___________ ion