CHE 106 Lecture Notes - Lecture 17: Zirconium, Atomic Radius, Isoelectronicity

• School: Syracuse University
• Department: Chemistry
• Course: CHE 106
• Professor: J.French

Document Summary

In an isoelectronic series, ions have the same number of electrons. First ionization energy : the energy required to take one electron from a neutral atom. When closer to the nucleus, it is harder to remove those electrons. Decreases down a group; as atomic radius increases, it"s farther from the nucleus, and it"s easier to remove that electron. It"s easier to remove an electron the farther it is from the nucleus. As one goes down a column, less energy is required to remove the first electron. Atomic radius due to our quantum level. Zeff (nuclear charge effect the outermost electron experiences) Decrease from left to right across a row (due to increasing zeff) Increase from top to bottom of a column (due to increasing n) Generally, as one goes across a row, it"s harder to remove the outermost electron. There are two types of discontinuities in this trend. The first discrepancy occurs between groups 2a and 3a.