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In chemistry, homonuclear molecules, or homonuclear species, are molecules composed of only one element. Homonuclear molecules may consist of various numbers of atoms. The size of the molecule an element can form depends on the element's properties, and some elements form molecules of more than one size. The most familiar homonuclear molecules are diatomic molecule, which consist of two atoms, although not all diatomic molecules are homonuclear. Homonuclear diatomic molecules include hydrogen (H2), oxygen (O2), nitrogen (N2) and all of the halogens. Ozone (O3) is a common triatomic homonuclear molecule. Homonuclear tetratomic molecules include arsenic (As4) and phosphorus (P4).
Allotropes are different chemical forms of the same element (not containing any other element). In that sense, allotropes are all homonuclear. Many elements have multiple allotropic forms. In addition to the most common form of gaseous oxygen, O2, and ozone, there are other allotropes of oxygen. Sulfur forms several allotropes containing different numbers of sulfur atoms, including diatomic, triatomic, hexatomic and octatomic (S2, S3, S6, S8) forms, though the first three are rare. The element carbon is known to have a number of homonuclear molecules, including diamond and graphite.
Sometimes a cluster of atoms of a single kind of metallic element is considered a single molecule.[1]
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In chemistry, homonuclearmolecules, or homonuclear species, are molecules composed of only one element. Homonuclearmolecules may consist of various numbers...
be homonuclear. Otherwise, if a diatomic molecule consists of two different atoms, such as carbon monoxide (CO) or nitric oxide (NO), the molecule is...
distinction from ions is dropped and molecule is often used when referring to polyatomic ions. A molecule may be homonuclear, that is, it consists of atoms...
com. Retrieved 2023-10-25. "Definition of HETERONUCLEAR". www.merriam-webster.com. Retrieved 2023-10-25. Homonuclearmolecule Chemical compound v t e...
its axis and perpendicular to it. Homonuclear triatomic molecules contain three of the same kind of atom. That molecule will be an allotrope of that element...
A homonuclear diatomic molecule is one composed of two atoms of the same element. Examples are H2, O2, and N2. A heteronuclear diatomic molecule is composed...
chemistry. This paper was the first to properly explain the bonding in a homonuclearmolecule such as H2. It is no coincidence that the Heitler–London work appeared...
vibronic states of homonuclear diatomic molecules giving rise to pure rotational (ortho - para) transitions in a homonuclear diatomic molecule. The transition...
pressure, is in a configuration of eight atoms bound together (a homonuclearmolecule). The canonical example is sulfur, S8, but red selenium is also an...
"Hyperfine-Induced Ungerade-Gerade Symmetry Breaking in a Homonuclear Diatomic Molecule near a Dissociation Limit: 127I2 at the 2P3/2 − 2P1/2 Limit"...
molecular symmetry describes the symmetry present in molecules and the classification of these molecules according to their symmetry. Molecular symmetry is...
valence bond theory correctly predicts the dissociation of homonuclear diatomic molecules into separate atoms, while simple molecular orbital theory predicts...
relative energies of the MOs of like symmetry. For homodiatomics (homonuclear diatomic molecules), bonding σ orbitals have no nodal planes at which the wavefunction...
valence bond theory correctly predicts the dissociation of homonuclear diatomic molecules into separate atoms, while simple (Hartree–Fock) molecular orbital...
unlabelled protein the usual procedure is to record a set of two-dimensional homonuclear nuclear magnetic resonance experiments through correlation spectroscopy...
a van der Waals molecule with formula He2 consisting of two helium atoms. This chemical is the largest diatomic molecule—a molecule consisting of two...
needed][clarification needed] Being the lightest stable neutral homonuclear diatomic molecule after H2, and the helium dimer, dilithium is an extremely important...
labelled with an asterisk (*) on molecular orbital diagrams. In homonuclear diatomic molecules, σ* (sigma star) antibonding orbitals have no nodal planes passing...
Trinitrogen also known as the azide radical is an unstable molecule composed of three nitrogen atoms. Two arrangements are known: a linear form with double...
(Flerovium) are gases.) The elements which are stable two atom homonuclearmolecules at standard temperature and pressure (STP), are hydrogen (H2), nitrogen...
complex"). It is also an excimer molecule but not a homonuclear dimer. For instance, Xe2*, Kr2*, Ar2* are excimer molecules, while XeCl*, KrCl*, XeBr*, ArCl*...
interaction is rarely important and is assumed to be negligible. In the homonuclear case where γ I = γ S {\displaystyle \gamma _{I}=\gamma _{S}} , if W 2...
slightly. A molecule is an electrically neutral group of two or more atoms held together by chemical bonds. A molecule may be homonuclear, that is, it...
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