This 3 sentence document summary provides essential information about the original document: The original document is Lecture 2 prepared by Dr. Hoda Abd El-Shafy Shilkamy, a lecturer of physical chemistry in the chemistry department at the faculty of science at Sohag University.

1. Lecture 2
Prepared by
Dr. Hoda Abd El-Shafy Shilkamy
Lecturer of Physical Chemistry
Chemistry department- faculty of Science
–Sohag University