CK-12 Foundation
Ck 12: Chemistry: Periodic Trends: Ionization Energy
[Free Registration/Login may be required to access all resource tools.] Explains ionization energy, trends in ionization energy, and electron shielding.
CK-12 Foundation
Ck 12: Chemistry: Electron Shielding
[Free Registration/Login may be required to access all resource tools.] Covers electron shielding, s orbital influence on shielding, paired electron spin and shielding.
CK-12 Foundation
Ck 12: Chemistry: Periodic Trends: Ionization Energy
[Free Registration/Login may be required to access all resource tools.] Explains ionization energy, trends in ionization energy, and electron shielding.