Electron Configuration and Chemical Periodicity
... periodic reoccurrence of similar physical and chemical properties of the elements arranged by increasing atomic mass – Periodic table included the 65 known elements – Mendeleev left blank spaces for the undiscovered elements and was able to predict their properties – The true basis of periodicity is ...
... periodic reoccurrence of similar physical and chemical properties of the elements arranged by increasing atomic mass – Periodic table included the 65 known elements – Mendeleev left blank spaces for the undiscovered elements and was able to predict their properties – The true basis of periodicity is ...
Molecular orbital diagram
A molecular orbital diagram, or MO diagram, is a qualitative descriptive tool explaining chemical bonding in molecules in terms of molecular orbital theory in general and the linear combination of atomic orbitals (LCAO) molecular orbital method in particular. A fundamental principle of these theories is that as atoms bond to form molecules, a certain number of atomic orbitals combine to form the same number of molecular orbitals, although the electrons involved may be redistributed among the orbitals. This tool is very well suited for simple diatomic molecules such as dihydrogen, dioxygen, and carbon monoxide but becomes more complex when discussing even comparatively simple polyatomic molecules, such as methane. MO diagrams can explain why some molecules exist and others do not. They can also predict bond strength, as well as the electronic transitions that can take place.