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Core of atom

The attraction of an electron occupying an HO centered on atom A to the cores of atom B takes the form ... [Pg.138]

According to Gauss electrostatic theorem, the total bond flux, Sij, leaving the core of atom i is equal to its charge, which is the same as the number of valence electrons, (the formal ionic charge see Formal Charge) or atomic valence), that the atom uses in bonding, equation (2). [Pg.5378]

The electron-core interaction, Vab/ is calculated as the interaction between an electron in a valence s orbital on atom A with the nuclear core of atom B ... [Pg.92]

If we choose a definite explicit form for the core potentials of the core of atom C (which has Nc core electrons, say)... [Pg.695]

Recent theoretical studies and accurate experimental determinations of electron densities in molecules have confirmed that the majority of electrons do indeed form a concentrated core near the nucleus which appears very atomic like [120]. The electTOTi density is very monotonic as the radial distance from the nucleus increases. Chemists sometimes wrongly consider that the electron density in the cores of atoms has outer maxima corresponding to the shell structures. The inner electron cores are almost transferable entities and cmisequently endorse the valence-care partition proposed by Lewis and Kossel, and this property is utilised in frozen core approximations [138]... [Pg.32]

The interesting carbido methylimido isopropoxo complex [W4(/i4-C)(/i-OlV)4(/i-NMe)(OPr )8] has a butterfly W4 core of atoms with the / 4-carbide atom closer to the wingtip tungstens (W-C, 1.914 A, 1.956 A) than to the backbone mngstens (W-C, 2.241 A, 2.251 A). The backbone W atoms are octahedrally coordinated whereas the wingtip tungstens are five-coordinated. ... [Pg.299]

As the valence-electron approximation is supposed to be introduced, the term Zm/Rm in (6.16) means the electron interaction with the core of atom M in the point-charge approximation. As AO Xmm( ) can be considered as an eigenfunction of opera tor (—4+ m) and introducing the point-charge approximation for Zm/Rn N / M), we obtain the matrix elements of operator (6.15) in the form [222]... [Pg.200]

A metallic solid is a solid that consists of positive cores of atoms held together by a surrounding sea of electrons (metallic bonding). In this kind of bonding, positively charged atomic cores are surrounded by delocalized electrons. Examples include iron, copper, and silver. [Pg.445]

The values for the energy of the crystal lattice were calculated on the basis of the formula of E.S. Sarkisov [822], originally used by him for calculating the energies of crystal lattices of ionic compounds. The essence of Sarkisov s formula, however, derived on the assumption of the collectivization of electrons between the cores of atoms of the two components, makes it more suitable for calculation of the energy of the lattices of metal-like compounds with a high proportion of metallic bond this has been shown by G, V. Samsonov [457], O.I. Shulishova [823], and G, V. Samsonov and O. I, Shulishova [880],... [Pg.10]


See other pages where Core of atom is mentioned: [Pg.110]    [Pg.112]    [Pg.116]    [Pg.21]    [Pg.9]    [Pg.105]    [Pg.32]    [Pg.32]    [Pg.398]    [Pg.398]    [Pg.62]    [Pg.105]    [Pg.294]    [Pg.59]    [Pg.258]    [Pg.86]    [Pg.345]    [Pg.345]    [Pg.48]    [Pg.13]    [Pg.90]    [Pg.96]    [Pg.37]    [Pg.141]    [Pg.27]    [Pg.683]    [Pg.74]    [Pg.209]    [Pg.70]    [Pg.82]    [Pg.930]    [Pg.564]    [Pg.651]    [Pg.20]    [Pg.56]    [Pg.203]    [Pg.351]    [Pg.210]   
See also in sourсe #XX -- [ Pg.3 , Pg.168 ]

See also in sourсe #XX -- [ Pg.13 , Pg.168 ]




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Core of an atom

Core of the atom

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