Search results
Results From The WOW.Com Content Network
The octet rule is a chemical rule of thumb that reflects the theory that main-group elements tend to bond in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas. Learn about the origin, explanation, exceptions, and applications of the octet rule with examples and diagrams.
The 18-electron rule is a chemical rule of thumb for predicting stable transition metal complexes. It states that the valence orbitals of transition metals can accommodate 18 electrons as bonding or non-bonding pairs, and that complexes with 18 electrons are often exchange inert.
Learn how to assign a number of valence electrons to individual atoms in a molecule using neutral or ionic counting methods. See examples, rules, and special cases for different types of compounds and ligands.
A valence electron is an electron in the outermost shell of an atom that can participate in chemical bonding. Learn how to determine the number of valence electrons of an element from its periodic table group and how they affect its reactivity and properties.
Learn how to describe the distribution of electrons in atoms or molecules using atomic or molecular orbitals. Find out the notation, rules, and examples of electron configurations and their applications in chemistry and physics.
A transition metal is a chemical element in the d-block of the periodic table that has a partially filled d sub-shell. Transition metals are reactive, form compounds in different oxidation states, and have many applications in alloys, catalysis and magnetism.
Learn how to determine the d electron count of a transition metal center in a coordination complex, and how it affects the geometry and reactivity of the complex. Explore the formalism, the models, and the examples of d electron count in chemistry.
Oxidation state, or oxidation number, is the hypothetical charge of an atom in a compound if all its bonds were fully ionic. Learn how to calculate it using different methods, and see the list of oxidation states of the elements.