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Lewis Structure GeneratorLewis Structure generator as many people had asked in the past, is there one? There is one but it did not really worth to purchase for students who only focus for one exam To success in it, the old way to do it is to memorized and practice the drawxing until it becomes a "natural memorization." spoke by one of the senior. Lewis structure is a 2 D structure on papers represents the bonds between atoms as lines or dots and nonbonding electrons. They are useful to tell us whether any atoms possess lone pair or have a formal charge. Formal ChargeFormal charge = Valence electrons – unbonded electrons – ½ ( bonding electrons). The answer for many exam questions are always looking for a molecule that most stable, one of which is to have formal charge =0 . Examples of the following case.
Octet RuleOctet rule must be obey in general chemistry except the case for the electrons that within the 3p atoms such as P, S, Cl. It is because 3p is big enough to hold more electrons so the octet rule cannot be applied here. Other atoms such as N, O, F only have 2 p orbital so they do not have the same capacity to break the octet rule. Resonance StructureResonance structure is not really that there are three compounds as it is shown below. The really thing is a hybrid except we draw on the paper, we have to draw like how they make a cartoon in the old Disney Time.
These structures are called "resonance "contributors." and the hybrid usually looks more like the major contributors. Resonance structures have major contributors and minor contributors, and the major contributors just mean it is more stable than the minor one. ( less formal charge) Lewis Structure and Resonance Exam Review TipsHere are some quick facts to remember... so when it comes to the exam, they will safe you some times to analyze.
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