Beungkeut kovalén: Béda antarrépisi
Konten dihapus Konten ditambahkan
m Ngarapihkeun éjahan, replaced: rea → réa (4), ea → éa (8), eo → éo using AWB |
m Ngarapihkeun éjahan, replaced: model → modél (5) |
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Baris ka-7:
[[Image:covalent.svg|right|thumb|160px|Early concepts in covalent bonding arose from this kind of image of the molecule of [[methane]]. Covalent bonding is implied in the [[dot and cross diagram]] that indicates sharing of electrons between atoms.]]
While the idéa of shared electron pairs provides an effective qualitative picture of covalent bonding, [[quantum mechanics]] is needed to understand the nature of these bonds and predict the structures and properties of simple molecules. [[Walter Heitler]] and [[Fritz London]] are credited with the first successful quantum mechanical explanation of a chemical bond, specifically that of [[molecular hydrogen]], in 1927. Their work was based on the valence bond
== Bond polarity ==
Baris ka-34:
== Current theory ==
Today the valence bond
Using quantum mechanics it is possible to calculate the electronic structure, energy levels, bond angles, bond distances, dipole moments, and electromagnetic spectra of simple molecules with a high degree of accuracy. Bond distances and angles can be calculated as accurately as they can be méasured (distances to a few pm and bond angles to a few degrees). For small molecules, calculations are sufficiently accurate to be useful for determining thermodynamic héats of formation and kinetic activation energy barriers.
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