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OpenStax Chemistry: Atoms First 2e Chapter 5 Key Terms
Chapter 5 Key Terms
22
Chemistry
Undergraduate 1
02/03/2022

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Term
antibonding orbital
Definition
molecular orbital located outside of the region between two nuclei; electrons in an antibonding orbital destabilize the molecule
Term
degenerate orbitals
Definition
orbitals that have the same energy
Term
homonuclear diatomic molecule
Definition
molecule consisting of two identical atoms
Term
hybrid orbital
Definition
orbital created by combining atomic orbitals on a central atom
Term
hybridization
Definition
model that describes the changes in the atomic orbitals of an atom when it forms a covalent compound
Term
linear combination of atomic orbitals
Definition
technique for combining atomic orbitals to create molecular orbitals
Term
molecular orbital
Definition
region of space in which an electron has a high probability of being found in a molecule
Term
molecular orbital diagram
Definition
visual representation of the relative energy levels of molecular orbitals
Term
molecular orbital theory
Definition
model that describes the behavior of electrons delocalized throughout a molecule in terms of the combination of atomic wave functions
Term
node
Definition
plane separating different lobes of orbitals, where the probability of finding an electron is zero
Term
overlap
Definition
coexistence of orbitals from two different atoms sharing the same region of space, leading to the formation of a covalent bond
Term
pi bond (? bond)
Definition
covalent bond formed by side-by-side overlap of atomic orbitals; the electron density is found on opposite sides of the internuclear axis
Term
s-p mixing
Definition
change that causes ?p
Term
sigma bond (? bond)
Definition
covalent bond formed by overlap of atomic orbitals along the internuclear axis
Term
sp
Definition
one of a set of two orbitals with a linear arrangement that results from combining one
Term
sp2
Definition
one of a set of three orbitals with a trigonal planar arrangement that results from combining one
Term
sp3
Definition
one of a set of four orbitals with a tetrahedral arrangement that results from combining one
Term
sp3d
Definition
one of a set of five orbitals with a trigonal bipyramidal arrangement that results from combining one
Term
sp3d2
Definition
one of a set of six orbitals with an octahedral arrangement that results from combining one
Term
valence bond theory
Definition
description of bonding that involves atomic orbitals overlapping to form ? or ? bonds, within which pairs of electrons are shared
Term
? bonding orbital
Definition
molecular orbital formed by side-by-side overlap of atomic orbitals, in which the electron density is found on opposite sides of the internuclear axis
Term
? bonding orbital
Definition
molecular orbital in which the electron density is found along the axis of the bond
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