CHEM 112 Lecture Notes - Lecture 15: Effective Nuclear Charge, Ionic Radius, Valence Electron

• School: Queen's University
• Department: Chemistry
• Course: CHEM 112
• Professor: Richard Oleschuk

Document Summary

Rows represent qn n for valence electrons. Many atomic properties can be qualitatively understood by simply considering coulombs. In atoms, nucleus has a z charge, each electron is -1. Core electrons tend to shield nucleus from the valence electrons. Effective nuclear charge zeff for valence electrons< m+ + e- delta h=ionization energy. Ionizations usually starts from electrons in the out-most shell. M+ e- -> m-. delta h<0; known as electron affinity. Easily loose one electron to form +1 ions. Loose 2 electrons to form +2 ions.