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| 1. | Structure of NO2+ charge will come on N or O | 
| Answer» Because that set of atoms is more stable in that configuration, if an extra electron is available. The “octet rule” says that an atom is more stable if it has filled outermost s and p orbitals. There is one s, and 3 p’s, and each orbital holds 2 electrons, so eight is the good number. Since nitrogen starts with 5 and oxygen starts with 6, by sharing pairs they form bonds and get almost up to 8, but there is an odd number and it is what we call a radical—fairly unstable, prone to stealing a single electron from another molecule (creating another radical, and so on—this kind of chain reaction is how we almost destroyed the ozone layer with a small amount of chemicals.) If there happens to be surplus electron around, NO2 is stabilized by adding it on. And that is why nitrite exists and why its charge is -1. | |