CHEM101 Study Guide - Atomic Number, Boron, Electron Configuration

• School: University of Alberta
• Department: Chemistry
• Course: CHEM101
• Professor: Yoram Apelblat

Document Summary

Goal 1 describe arrangement of e "s in an atom. 5 e in 2p sublevel (px, py and pz collectively) Goal 2 predict e configuration for different atoms. Most times, a sublevel is completely filled before the next one starts to fill. Relative energies of sublevels dictate order (obtained experimentally) Order : 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, Or the diagram above figure 8. 11 (next page) Or understanding the periodic table arrangement as in fig. Goal 3 give the e distribution among orbitals. e are shown as arrows. Note that the energy levels here and the next few slides show the energy levels as equal. They are not but i"ll be running out of space if i drew them correctly. We start as in boron and fill 5 e . Example: write the electronic configuration for xe and w. practice! Or using a condensed notation [xe] 6s2 4f14 5d4.