Sequencing is concerned with the selection of an appropriate sequence or order of performing a series of jobs to be done on a finite number of machines or service facilities in some well defined technological order so as to optimize some measure of performance of the system, such as minimizing overall, total elapsed time etc. Decision trees are used in solving sequential problems where there's an element of uncertainty. We use expected values to find the best alternative. A decision tree is a graphical representation of the decision process indicating decision alternatives, states of nature, associated probabilities and conditional payoffs for each combination of decision alternatives and states of nature. It shows all the possible outcomes for each choice as subsidiary branches on the tree.

1.What does non polar molecular solids comprise of?

2.Explain why polar molecular substances are bad conductors of electricity.

3.What holds molecules together in polar molecular substances?

4.Hydrogen bonded molecular solids are volatile liquids and soft solids at room temperature and pressure. Explain.

5.What are ionic structures made up of?

6.How does ionic structures conduct electricity in molten state or when dissolved in water?

7.Do metals have an orderly collection of positive ions?

8.Explain how metals conduct electricity and heat.

9.Metals are not brittle. Explain

10.Why covalent solids are called giant molecules?