Presentation on theme: "LEWIS STRUCTURES. Lewis Dot Diagrams Show the valence electrons for an element. Steps. 1. Draw element Symbol 2. Place the number of electrons around."— Presentation transcript:
Lewis Structures Combining of the dot diagrams to show bonding and to predict shape.
Steps for Lewis Structures 1. Add up total number of valence electrons. 2. Draw a skeleton (Carbon, the solo element, or the most electronegative element goes in the middle) ★ Hydrogen and the Halogens CANNOT be in the center. 3. Distribute the electrons as PAIRS. Start from the outside and move inward. 4. Count and adjust electrons till each element has 8. (except Hydrogen)
Polyatomics Same as compounds but you must add/subtract the charge from the electrons in step 1. And place the structure in brackets with the charge outside. Ex. Hydroxide. How many electrons in a neutral OH? 7 How many in OH - ? 8