4. Identify the likely dominant bonding mechanism in: a) Mgo b) InSb c) Tio d) B

Question

4. Identify the likely dominant bonding mechanism in: a) Mgo b) InSb c) Tio d) Brass e) Rubber Justify, your answers for Insb and TiO2 by calculating % of ionic bonding. For a K -CI distance ion pair, the attractive and repulsive energies E A and ER, respectively. depend on the between the ions according to 5. 10-6 and ER = 5.8x Here, energies are in the units of electron volts per K-Cl pair, and the ion-ion separation distance is in nanometers. The net energy Ex is the sum of the two expressions above. Using Excel, create a single plot of Ex. En. and E, versus r. Use r of 0.1 to 1.0 nm. Copy/paste plots here. What is the equilibrium spacing ro and the bonding energy Eo

Explanation / Answer

Ans 4 :

a) MgO : It is a compound that is made up of oppositely charged ions , so the ionic bonding is present in it.

b) InSb : It is an intermetallic compound that is also used as a semiconductor. The covalent bonding is present in the compound due to sharing of electrons.

c) TiO2 : The compound is not completely ionic , so the ionic and covalent bonding both are present , though primarily ionic.

d) Brass is an alloy of copper and zinc , both of which are metals so the bonding present in it is metallic bonding.

e) Rubber: It a compound that is made up of carbon and hydrogen primarily. So the bonding present in it is covalent, along with some vander waal interactions.

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