There exist a huge number of exotic ... from group III on the periodic table (such as boron, indium, or gallium). These elements have only three electrons in their valence shell, so where N ...

Covalent Bonding: Concept of electronegativity, Fajan’s rule, dipole moment, Valence Shell ... Modern periodic law and present form of the periodic table, s, p. d and f block elements, periodic ...

One of my favorite anecdotes about prime numbers concerns Alexander Grothendieck, who was among the most brilliant mathematicians of the 20th century. According to one account, he was once asked ...

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, P. R. China Quzhou Institute for Innovation in Resource Chemical Engineering, Quzhou, ...