elect ALL of the following that can be used to explain the polarities of NO2 and SeCl42- (these molecules are mentioned in earlier questions). NO2 has a permanent dipole moment or a net dipole moment greater than zero whereas SeCl42- has no net or zero dipole moment. Both molecules are symmetrical and hence nonpolar Due to their respective shapes, in NO2 the bond dipole moments reinforce each other whereas in SeCl42- they cancel out each other. NO2 has no net dipole moment and SeCl42- has a net dipole moment greater than zero. NO2 is an unsymmetrical molecule whereas SeCl42- is a symmetrical ion.
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.
Select ALL of the following that can be used to explain the polarities of NO2 and SeCl42- (these molecules are mentioned in earlier questions).
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NO2 has a permanent dipole moment or a net dipole moment greater than zero whereas SeCl42- has no net or zero dipole moment. |
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Both molecules are symmetrical and hence nonpolar |
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Due to their respective shapes, in NO2 the bond dipole moments reinforce each other whereas in SeCl42- they cancel out each other. |
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NO2 has no net dipole moment and SeCl42- has a net dipole moment greater than zero. |
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NO2 is an unsymmetrical molecule whereas SeCl42- is a symmetrical ion. |
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