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Assignment 3, due on Oct. 13 before 4:30 pm

Inorganic macromolecules are present in elements and compounds. They are present in diamond, graphite, fullerenes, sulfur, phosphorus, silicate, and boron nitride.

Since vague questions asking you to describe or discuss these structures have caused a considerable frustration in some members of the class, the following questions have changed to demand specific information. The wording put in here is for the purpose of directing your thought, because you may not see the purpose of the assignment. However, if you feel that you have a better way to write up your assignment, please feel free to change some parts as suggested here.

The format of the discussion is suggested, and please provide the information in the blank (__) spaces. You may down load this file and use a word processor to do your assignment, leaving spaces for your diagrams, which must be hand drawn not by photo-copying or electronic images from other source.


  1. Discuss the structure of diamond, a metastable allotrope of carbon at room temperature.

  2. Silicon is perhaps the most important element in information technology (IT), and its crystal and electronic structures form the basis of its application in the electronic industry. Discuss the bonding and structure of this key element.

  3. What are the allogropes of sulfur? At what temperature will one transform into another? How do atomic orbitals overlap in the formation of sulfur molecules and chains? How are the properties of sulfur related to the structure and bonding of sulfur?

  4. What are the allotropes of phosphorus? How are their properties related to their structures. Discuss the bonding for these structures. (No guide or hint is given here, and you are free to present your information in any format.)