CHEM101 Chapter Notes -Fluorine, Beryllium

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

Document Summary

Quantum model in relation to periodic table: allows us to determine electron configuration for ground states of periods, utilize aufbau principle by adding one proton consecutively to atoms of table while simultaneously adding an electron to lowest available energy sublevel, electron configuration: shorthand notation to indicate distribution of electrons written as nl# where n is the principal energy level, l is the sublevel and # indicates number of electrons in the sublevel, orbital diagrams consist of a box/circle or line for each orbital group in an energy level, grouped by sublevels with arrows indicating positive or negative spin (up arrow=positive, down arrow=negative) Period 1: ground state elements, n=1, 1s sublevel, 1s orbital, hydrogen, electron configuration: 1s1; n=1, l=s sublevel and 1 superscript indicates 1 electron, 1s = positive spin, helium"s second electron (first electron is same as hydrogen), electron configuration: 1s2; n=1, l=s sublevel and 2 superscript indicates 2 electrons, 1s = opposing spins because multiple electrons.