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Unit 4: Atomic and Nuclear Structure Periodic Trends II

Unit 4: Atomic and Nuclear Structure Periodic Trends II. Periodic Trends II. Ionization Energy:. What is ionization energy?. First, second and third ionization energies. Magnesium as an example …. Lithium. 1 st IE:. 513 kJ/ mol. 2 nd IE:. 7298 kJ/ mol. +3. 3 rd IE:. 11815 kJ/ mol.

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Unit 4: Atomic and Nuclear Structure Periodic Trends II

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  1. Unit 4: Atomic and Nuclear Structure Periodic Trends II

  2. Periodic Trends II Ionization Energy: What is ionization energy? First, second and third ionization energies Magnesium as an example … Lithium 1st IE: 513 kJ/mol 2nd IE: 7298 kJ/mol +3 3rd IE: 11815 kJ/mol

  3. Periodic Trends II Ionization Energy: What is ionization energy? First, second and third ionization energies Valence e-vs core e- Lithium 1st IE: 513 kJ/mol 2nd IE: 7298 kJ/mol +3 3rd IE: 11815 kJ/mol

  4. Periodic Trends II Ionization Energy: What is ionization energy? First, second and third ionization energies Valence e-vs core e- Lithium Magnesium 1st IE: 513 kJ/mol 738 kJ/mol +3 2nd IE: 7298 kJ/mol 1451 kJ/mol 3rd IE: 11815 kJ/mol 7732 kJ/mol

  5. Periodic Trends II Ionization Energy: What is ionization energy? First, second and third ionization energies Valence e-vs core e- Lithium Magnesium Aluminum 1st IE: 513 kJ/mol 738 kJ/mol 577 kJ/mol 2nd IE: 7298 kJ/mol 1451 kJ/mol 1817 kJ/mol 3rd IE: 11815 kJ/mol 7732 kJ/mol 2745 kJ/mol

  6. Periodic Trends II Ionization Energy: Periodic trends Why why why??? Exceptions 

  7. Periodic Trends II Electron Affinity: What is electron affinity? Ionization energy in reverse … Periodic trend Relationship between ionization energy and electron affinity Why why why???

  8. Periodic Trends Ionic Size: What is ionic radii and how does it compare to atomic radii? Li+ F Li F- 78 pm 71 pm 152 pm 133 pm

  9. Periodic Trends Ionic Size: The periodic trend is the same as that of atomic size

  10. Periodic Trends Other Trends you probable already know about: Valence electrons, ion formation, metals vs nonmetals, and reactivity alkali metals Real alkali metals AP: Why does the reactions show below form NaCl and not NaCl2? Use ionization energies in your explanation. Na + Cl2 NaCl

  11. Periodic Trends II Sample Problems: Compare the elements C, O and Si. Place in order of increasing atomic radius. Which has the largest ionization energy and why? Which has the more negative electron affinity, O or C?

  12. Periodic Trends

  13. Periodic Trends

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