25. For which of the following we CAN NOT draw a stable Lewis structure (Structure is NOT possible) ? * Mark only one oval. N cannot have 5 bonds (10 e) SF6 NCI5 around it. PCI5 All of the above have stable Lewis structures 26. Consider the ASF3 molecule (As = Arsenic Z= 33).What is the hybridizatio of the central atom and formal charge on As? * Mark only one oval. sp, 0 sp3, -1 sp3,0 sp2,-1 the above Lewis structure is wrong 27. What is the electronic configuration of Cu + * Mark only one oval. [Ar] 3d8 [Ar] 3d9 [Ar] 4s2 3d8 [Ar] 4s1 3d9 [Ar] 3d10 00000
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.
![For which of the following we CAN NOT draw a stable Lewis structure
(Structure is NOT possible) ? *
25.
Mark only one oval.
N cannot have 5
bonds (10 e)
SF6
NCI5
around it.
PCI5
All of the above have stable Lewis structures
26.
Consider the ASF3 molecule (As = Arsenic Z= 33). What is the hybridizatio
of the central atom and formal charge on As? *
Mark only one oval.
sp, 0
sp3, -1
sp3,0
sp2,-1
the above Lewis structure is wrong
27.
What is the electronic configuration of Cu + *
Mark only one oval.
[Ar] 3d8
[Ar] 3d9
[Ar] 4s2 3d8
[Ar] 4s1 3d9
[Ar] 3d10
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