Choose the best Lewis structure from those presented below. (It will help to work out the missing formal charges for the atoms in these different structures) [Image description: Lewis structure A has a N atom singly bound to two O atoms. There is one electron pair on N. One O atom has three electron pairs and the other O atom has two electron pairs and another single bond to a H atom. Lewis structure B has a O atom, 01, singly bound to a N atom and doubly bound to another O atom, O2. There is one electron pair on O, and two electron pairs on O2. On the N atom there are two electron pairs and another single bond to a H atom. Lewis structure C has a O atom, O1, singly bound to another O atom, 02, and doubly bound to a N atom. There are is one electron pair on O, and two electron pairs plus another singly bond to a H atom on O2. There are two electron pair on N. Lewis structure D has a N atom singly bound to a O atom, O1, and doubly bound to another O atom, O2. There are two electron pairs plus another single bond to a H atom on O, and two electron pairs on O2. There is also one electron pair on N.] H-ö-Ñ-ö: H-N-ö=ö H-ö-ö=N H-ö-N=ö A В D Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a A b B d D
Formal Charges
Formal charges have an important role in organic chemistry since this concept helps us to know whether an atom in a molecule is neutral/bears a positive or negative charge. Even if some molecules are neutral, the atoms within that molecule need not be neutral atoms.
Polarity Of Water
In simple chemical terms, polarity refers to the separation of charges in a chemical species leading into formation of two polar ends which are positively charged end and negatively charged end. Polarity in any molecule occurs due to the differences in the electronegativities of the bonded atoms. Water, as we all know has two hydrogen atoms bonded to an oxygen atom. As oxygen is more electronegative than hydrogen thus, there exists polarity in the bonds which is why water is known as a polar solvent.
Valence Bond Theory Vbt
Valence bond theory (VBT) in simple terms explains how individual atomic orbitals with an unpaired electron each, come close to each other and overlap to form a molecular orbital giving a covalent bond. It gives a quantum mechanical approach to the formation of covalent bonds with the help of wavefunctions using attractive and repulsive energies when two atoms are brought from infinity to their internuclear distance.
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