11. What is the electron-domain geometry of water molecule (H2O)? a. bent b. tetrahedral c. trigonal planar d. linear 12. Write the correct Lewis dot structure for O2. Which statement correctly describes the structure of the whole molecule? a. There is a double bond and four lone pairs. b. There is a double bond and six lone pairs. c. There is a single bond and six lone pairs. d. There is a single bond, a double bond, and six lone pairs. 13. If there are four (4) electron pairs around the central atom of a molecule, these electron pairs are in a/n a. trigonal planar b. trigonal pyramidal arrangement. C. octahedral d. tetrahedral 14 The molecular geometry of the molecule NF3 is a. linear b. trigonal pyramidal c. tetrahedral d. trigonal planar 15 Which of the following species will exhibit tetrahedral molecular geometry? d. PCI5 a. CCI4 b. CO2 C. O3
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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