1. Phoebe Wiant, Jamie Ruggiero, Katherine Reese, Eileen Holland
Ionization Energy (7.4)
Phoebe Wiant, Jamie Ruggiero, Katherine Reese, Eileen Holland

2. Ionization Energy of an ion is the minimum energy required to remove an electron from the ground state of the isolated gaseous atom or ion.

3. Energy increases with each electron
More energy required to remove electron from positive ion
Removing inner shell electrons causes great increase in energy
Large increase when taking from Noble Gas Core

5. Examples Na(g)Na+(g)+ e- 1st ionization level example
2nd ionization level example
Na+ (g)  Na2+(g)+ e-

6. Period Trends for 1st Ionization Energy Level

7. Trends in the 1st Ionization Energies
Within Rows, I increases with atomic number
Within Groups, I decreases with atomic number
Representative elements show larger range of values of I

8. Periodic Trends Smaller atoms tend to have higher energies
Close to nucleus
Irregularities
Nitrogen to Oxygen (Electron Repulsion)
Beryllium to Boron (Electron Shielding)

9. Electron Configuration of Ions
Electrons are removed are always removed first from the occupied orbitals having the largest principal quantum number.
this means that 4s would be removed before 3d