This preview shows page 1. Sign up to view the full content.
Unformatted text preview: each other's charge very well, so the increasing number of protons makes a big difference. This is what is happening when we go across a row of the periodic table. Zn has 2 more protons than Ni; it also has 2 more electrons, but since those electrons are added to the same shell (they don't add to the core), they do not screen those 2 additional protons very much. So, the effective nuclear charge of Zn is expected to be larger. Bonus. What is Hund's Rule? (1 point) Hund's Rule states that, due primarily to electronic repulsions, since electrons have the same charge, they will occupy individual orbitals at the same energy before they pair up in the same orbital. For example, if there are three p orbitals at the same energy but with different orientations, electrons will occupy them individually because otherwise there would be too much charge building up in the same orbital (the same region of space)....
View Full Document
This homework help was uploaded on 04/18/2008 for the course CHEM 131 taught by Professor Landry during the Spring '08 term at Vermont.
- Spring '08