![]() ![]() Let’s go through some examples to get a sense of what drawing a Lewis structure entails. In particular, Wolfram|Alpha will point out when there are multiple ways to draw a molecule rather than keeping you guessing on whether another answer is “as correct” as the given one. States interesting properties: Wolfram|Alpha draws your attention when neat things are happening inside of a molecule (special bond types, expanded valence shells, etc).Points out exceptions: Wolfram|Alpha teaches you how to correctly deal with these “special cases,” so you don’t fear them. ![]() (We give an in-depth explanation of different bonding types below.) Explains why bonds occur and distinguishes between bonding types: The interface determines which bonds should be single, double, or triple and why. This is truly at the heart of chemical bonding.It is completely self-contained: All relevant information (valence electron count, electronegativities of atoms, etc.) is inside of the steps if needed.The Step-by-step interface includes these features: Wolfram|Alpha now helps users understand the principles behind bonding and chemical structures. With these steps, users can go above and beyond just seeing what the Lewis structure of nitrogen dioxide (NO 2) looks like. With one click of a button, Wolfram|Alpha Pro users can access Step-by-step functionality that will guide them through the process of drawing a Lewis structure. For example, here are the Lewis structures of water and ethylene. The atoms (represented by letters) are connected by bonds (pairs of electrons represented by lines), with any “leftover” or unbonded electrons on each atom displayed as dots. Molecules are composed of atoms, bonds, and unbonded electrons. Thus, Wolfram|Alpha is expanding its Step-by-step interface into the realm of chemical bonding (with even more Step-by-step functionality coming soon). But as any good teacher will tell you, even more important than finding the answer is the procedure used to get that answer. Wolfram|Alpha now supports Lewis structures-diagrams that show both the bonded and unbonded electrons in a molecule. Bonding is pretty fundamental, as it determines the shape of a molecule, which in turn determines how a molecule behaves.
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