This monograph describes the new quantum theory called the weakest bound electron theory (WBE theory) proposed by Prof. Neng-Wu Zheng and its applications. It starts with the fundamentals of quantum mechanics and then illustrates the key points of WBE theory and the mathematical expressions of WBE theory. Finally, it presents a wide range of applications of WBE theory to the chemical and physical properties of atoms and molecules, including energy levels, transition properties, the difference law of ionization energies etc. It appeals to a broad readership, particularly researchers and academics in chemistry, physics, and materials science.

Neng-Wu Zheng is a distinguished professor of theoretical chemistry and inorganic chemistry. He was the director of the department of applied chemistry at University of Science and Technology of China (USTC) and was served on both the University Academic Committee and the University Academic Degree Committee at USTC. He was honored Special Government Allowances of the State Council of China, was invited as a visiting professor at the Department of Chemistry at Purdue University, and was a member of the International Advisory Board of Malaysia Journal of Chemistry.