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, Ca 2+, and Sc 3+ and the anions Cl −, S 2−, and P 3− are all isoelectronic with the Ar atom. CO, CN −, N 2, and NO + are isoelectronic because each has two atoms triple bonded together, and due to the charge have analogous electronic configurations (N − is identical in electronic configuration to O so CO is identical electronically ...
Broken Cooper pair electron, hole Composite fermion: Arise in a two-dimensional system subject to a large magnetic field, most famously those systems that exhibit the fractional quantum Hall effect. [4] electron Configuron [5] An elementary configurational excitation in an amorphous material which involves breaking of a chemical bond Cooper pair
Isolobal compounds are analogues to isoelectronic compounds that share the same number of valence electrons and structure. A graphic representation of isolobal structures, with the isolobal pairs connected through a double-headed arrow with half an orbital below, is found in Figure 1. Figure 1: Basic example of the isolobal analogy
The compounds Co(NO)(CO) 3 and Ni(CO) 4 illustrate the analogy between NO + and CO. In an electron-counting sense, two linear NO ligands are equivalent to three CO groups. This trend is illustrated by the isoelectronic pair Fe(CO) 2 (NO) 2 and [Ni(CO) 4]. [3] These complexes are isoelectronic and, incidentally, both obey the 18-electron rule.
Example: P 4. Electron count: 4 × P = 4 × 5 = 20 It is a 5n structure with n = 4, so it is tetrahedral. Example: P 4 S 3. Electron count 4 × P + 3 × S = 4 × 5 + 3 × 6 = 38 It is a 5n + 3 structure with n = 7. Three vertices are inserted into edges. Example: P 4 O 6. Electron count 4 × P + 6 × O = 4 × 5 + 6 × 6 = 56 It is a 5n + 6 ...
In chemistry, bond order is a formal measure of the multiplicity of a covalent bond between two atoms. As introduced by Gerhard Herzberg, [1] building off of work by R. S. Mulliken and Friedrich Hund, bond order is defined as the difference between the numbers of electron pairs in bonding and antibonding molecular orbitals.
In physics, mirror nuclei are a pair of isobars of two different elements where the number of protons of isobar one (Z 1) equals the number of neutrons of isobar two (N 2) and the number of protons of isotope two (Z 2) equals the number of neutrons in isotope one (N 1); in short: Z 1 = N 2 and Z 2 = N 1.
In 4+ 2 units, oxidation state of +2, also found in some indium halides, e.g. In 2 Br 3. nonlinear In 5+ 3 units isoelectronic with Hg 2+ 3. The compound In 2 Te 5 is a polytelluride containing the Te 2− 3 unit. None of the indium chalcogenides can be described simply as ionic in nature, they all involve a degree of covalent bonding.