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Periodic Trends

Periodic Trends. Periodic Trends. Nuclear Charge Shielding Atomic Radius. Nuclear Charge. Charge of the atom. Increases( ) Across Period. Increases ( ) Down Group. Periodic Trends. Nuclear Charge Shielding Atomic Radius. SHIELDING.

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Periodic Trends

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  1. Periodic Trends

  2. Periodic Trends • Nuclear Charge • Shielding • Atomic Radius

  3. Nuclear Charge • Charge of the atom

  4. Increases()Across Period

  5. Increases ()Down Group

  6. Periodic Trends • Nuclear Charge • Shielding • Atomic Radius

  7. SHIELDING • Lower energy levels “shield” higher energy levels from full nuclear charge

  8. NO CHANGE ACROSS PERIODS

  9. Increases ()Down Group

  10. Periodic Trends • Nuclear Charge • Shielding • Atomic Radius

  11. Atomic Radius Size of the atom video

  12. Decreases ()Across Period

  13. Increases ()Down Group

  14. IONS • An atom or group of atoms that have a positive and negative charge • Form when electrons are transferred b/w atoms

  15. Cations • Positively charged ion • Form by losing electron(s) • Smaller than original atom • Metals

  16. Anions • Negatively charge ion • Form by gaining electron(s) • Larger than original atom • Non-metals

  17. PERIODIC TRENDS • Ionic Radius • Ionization Energy • Electronegativity

  18. IONIC RADIUS • Size of the Ion

  19. Decreases ()Across Period Cations smaller than anions-trend restarts with NM

  20. Increases ()Down Group

  21. PERIODIC TRENDS • Ionic Radius • Ionization Energy • Electronegativity

  22. Ionization Energy Energy requires to remove an electron video

  23. Increases ()Across Period

  24. Decreases ()Down Group

  25. Ionization Energy • 1st ionization energy = 1 + charge ion • 2nd ionization energy = 2 + charge ion • 3rd ionization energy = 3 + charge ion.

  26. PERIODIC TRENDS • Ionization Energy • Ionic Radius • Electronegativity

  27. Electronegativity Ability of an atom to attract electron(s) video

  28. Increases ()Across Period

  29. Decreases ()Down Group

  30. Reactivity • Metals • Periods –  across • Groups –  down • Nonmetals • Periods-  across • Groups-  down

  31. Which group is more ionic? More electronegative? • Alkali Metals and Alkaline-Earth Metals

  32. WHY?

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