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Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
Periodic trends
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Periodic trends

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  • 1. ElectronConfiguration,Periodic Properties,and TrendsChapter 5
  • 2. 1.ATOMICRADIUS
  • 3. Atomic Radius (CovalentRadius)• Defined as ______ the distance half between the nuclei of identical atoms that are bonded together• Ex. Cl2 Cl Cl ½ distance
  • 4. Atomic Radius Trend Increases down and to the left Francium• Largest : ____________ Helium• Smallest : __________
  • 5. Atomic Radius Trend• REASON: increasing __________ nuclear charge (protons) – pulls the electrons _________ to the nucleus. closer• Example: Which element has a larger atomic radius – Silicon or Silicon Sulfur? __________• Example: Which element has a larger atomic radius – Sodium or Potassium? _____________ Potassium
  • 6. 2. IONIZATION ENERGY
  • 7. IONIZATION ENERGY • Ion : an atom or group of bonded atoms that have a __________ or __________ negative positive charge. Ex.Na+ Cl-11 protons = 11 + 17 protons = 17 +10 electrons = 10 - 18 electrons = 18 - 1+ 1-
  • 8. IONIZATION ENERGY• Ionization Energy : the energy required to remove ____ ________ from a neutral one electron atom.• Trend: Increases up and to the right
  • 9. Ionization Energy• Lowest ionization energy : _____________ Francium Group : _____________ Alkali Metals• Highest ionization energy: _____________ Helium Group : _____________ Noble GasEx. What has the higher ionization energy – Aluminum or Phosphorus? _____________ PhosphorusEx. What has the lower ionization energy – Calcium or Strontium? _____________ Strontium
  • 10. 3. Electronegativity
  • 11. Electronegativity• Definition: the measure of the ability of an atom in a chemical compound to _______ electrons closer to it. attract• _______ _______ don’t form Noble Gases compounds, so they are not included.
  • 12. Electronegativity Periodic Trend• Trend : Increases up and to the right
  • 13. Electronegativity• Highest Electronegativity : ________ Fluorine• Lowest Electronegativity : ________ Francium• Only element with 4.0 : __________ Fluorine• Only elements in the 3’s : Oxygen Chlorine Nitrogen _________, _________, __________.
  • 14. 4. METALLIC ACTIVITY
  • 15. METALLIC ACTIVITY TREND • Largest : ____________ Francium Helium • Smallest : __________
  • 16. 5. IONIC RADII
  • 17. Ionic Radii• Positive ion : ________ cation Na+ ex. ______• Negative ion : _______ anion ex. ______ Cl- lose• Neutral atoms _____ an electron to become positive __________ ions. Ex. K (19 electrons) K+ (18 electrons) + 1e- gain• Neutral atoms _____ an electron to become negative __________ ions. Ex. Cl (17 electrons) + 1e- Cl- (18 electrons)
  • 18. Ionic Radii• Positive ions, ex. ___, are ________ Na+ smaller than a neutral atom of that same element. (LOSE an electron)• Negative ions, ex. ____, are _______ Cl- larger than a neutral atom of the same element. (GAIN an electron)
  • 19. REVIEW
  • 20. Atomic Radius
  • 21. Ionization Energy
  • 22. Electronegativity

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