The APsolute RecAP: Chemistry Edition - Lewis Diagrams and Formal Charges
Lewis Diagrams give us information about the arrangement and bond order of compounds (0:23). There are four steps to write Lewis Structure: 1) Sum up available valence electrons (1:16), 2) write symbols and connect them with a single bond (1:57), 3) complete the octet for surrounding atoms (2:27), and 4) add remaining electrons as lone pairs on central atom (2:48).
Some elements, like hydrogen, boron and beryllium as well as elements in Period 3 and beyond are exceptions to the octet rule (3:24). Formal charges can be used to determine the best Lewis Structure (5:15). In our episode we discuss calculating the formal charge for two possible structures of CO2 (6:07).
Which two elements will never be in the center of a Lewis Structure?
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