Atomic orbital - Wikipedia The simple names s orbital, p orbital, d orbital, and f orbital refer to orbitals with angular momentum quantum number ℓ = 0, 1, 2, and 3 respectively These names, together with their n values, are used to describe electron configurations of atoms
Bonding molecular orbital - Wikipedia In theoretical chemistry, the bonding orbital is used in molecular orbital (MO) theory to describe the attractive interactions between the atomic orbitals of two or more atoms in a molecule In MO theory, electrons are portrayed to move in waves [1] When more than one of these waves come close together, the in-phase combination of these waves produces an interaction that leads to a species
HOMO and LUMO - Wikipedia In chemistry, HOMO and LUMO are types of molecular orbitals The acronyms stand for highest occupied molecular orbital and lowest unoccupied molecular orbital, respectively HOMO and LUMO are sometimes collectively called the frontier orbitals, such as in the frontier molecular orbital theory
Localized molecular orbitals - Wikipedia Organic chemistry is often discussed in terms of localized molecular orbitals in a qualitative and informal sense Historically, much of classical organic chemistry was built on the older valence bond orbital hybridization models of bonding
Natural bond orbital - Wikipedia In quantum chemistry, a natural bond orbital or NBO is a calculated bonding orbital with maximum electron density The NBOs are one of a sequence of natural localized orbital sets that include "natural atomic orbitals" (NAO), "natural hybrid orbitals" (NHO), "natural bonding orbitals" (NBO) and "natural (semi-)localized molecular orbitals" (NLMO)
Electron configuration - Wikipedia Electron atomic and molecular orbitals A Bohr diagram of lithium In atomic physics and quantum chemistry, the electron configuration is the distribution of electrons of an atom or molecule (or other physical structure) in atomic or molecular orbitals [1] For example, the electron configuration of the neon atom is 1s2 2s2 2p6, meaning that the 1s, 2s, and 2p subshells are occupied by two, two
Electron shell - Wikipedia In chemistry and atomic physics, an electron shell may be thought of as an orbit that electrons follow around an atom 's nucleus The closest shell to the nucleus is called the "1 shell" (also called the "K shell"), followed by the "2 shell" (or "L shell"), then the "3 shell" (or "M shell"), and so on further and further from the nucleus The shells correspond to the principal quantum numbers