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One thing I got confused on with this is when there is just one lone electron, lets say there is 41 electrons total and every element has an octet, you don't count the lone electron as a region of electron density, I believe you just ignore it, unless I am mistaken.
Also, regarding this,
The lone pairs DO count when naming the shape in some instances as it can help you know what shape it is. If its just 3 bonds and no lone pairs its going to be trigonal planar, but if its 3 bonds and 2 lone pairs then its T-Shaped. The bonding pairs make up the backbone of the structure, but lone pairs definitely influence the shape as they heavily repel bonded pairs. Seesaw has 4 bonded pairs and 1 lone pair, if it didn't have a lone pair it would likely just be tetrahedral.Dana Wilks 3I wrote:Yes, and they also count when determine electron arrangement. It is important however, to remember that lone pairs do not count when naming the shape.
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