Adequacy of the new formulation of the Periodic Law when fundamental variations occur in blocks and periods

Imyanitov, N. S.

doi:10.1007/s10698-014-9204-x

Cited by 9 publications

(4 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In particular the s-block has on the side of lower Z values, along the noble gas 'backbone', the p-block with largely different properties, while on the side of higher Z values, there is a p-, d-or f-block on the inner, middle or outer part of the spiral, respectively, with smoothly varying property values, as sketched on the Abstract Fig. The valence s and p orbitals are energetically comparatively near (see below) so that the elements of conventional groups 1 and 2 and 12-18 form a joint sp block of elements, from the chemical point of view, with smoothly varying properties [58,[61][62][63][64]. The d and f blocks appear inserted in the heavier sp rows after group 3.…”

Section: Combination Of the Two Concepts Of Order And Similarity Givementioning

confidence: 99%

“…Chemical facts clearly demonstrate that there is only one case of a chemically inert closed s 2 shell (He 1s 2 ), while the energetic proximity of ns and np for n ≥ 2 leads to joint nsp shells, from chemical points of view [63,99,111]. The formal ns 2 configurations of the elements in groups 2 (without a d core shell) and 12 (with a d 10 core shell) are strongly mixed in the free atoms with the np 2 configurations due to two-electron interactions, and for bonded atoms in addition by polarization or hybridization due to chemical interactions.…”

Section: The Structure Of Chemical Periodicitymentioning

confidence: 99%

“…13 and Refs. [62][63][64]186]). The reason is the energetic neardegeneracy of the ns and np orbitals ( Fig.…”

Section: The Grand Picturementioning

confidence: 99%

See 2 more Smart Citations

Physical origin of chemical periodicities in the system of elements

Cao

et al. 2019

Pure and Applied Chemistry

View full text Add to dashboard Cite

show abstract

Section: Combination Of the Two Concepts Of Order And Similarity Givementioning

confidence: 99%

Section: The Structure Of Chemical Periodicitymentioning

confidence: 99%

See 1 more Smart Citation

Physical origin of chemical periodicities in the system of elements

Cao

et al. 2019

Pure and Applied Chemistry

View full text Add to dashboard Cite

show abstract

“…Otras evidencias relacionadas con la periodicidad de materiales que involucran la incorporación de ligantes y la formación de compuestos de coordinación, se asocian con la variación periódica de algunas propiedades de cationes. Los trabajos de Imyanitov 33 muestran algunas tendencias periódicas en cationes divalentes y permiten proponer un esquema de tabla periódica de dichos cationes. Este autor establece que, la energía de ionización de estas especies depende del número total de electrones p en el bloque p, electrones d en el bloque d y electrones f en el bloque f, lo cual tiene influencia en las propiedades de sustituyentes y compuestos de cationes divalentes.…”

Section: De La Periodicidad De Los Elementos a La Periodicidad De Losunclassified

La Periodicidad De Los Elementos Y El Desempeño De Los Materiales: Un Complemento Para La Comprensión De La Tabla Periódica

Noval¹,

Carriazo²

2019

View full text Add to dashboard Cite

Table of Chemical Elements (IYPT 2019). For that reason, it is considered pertinent to highlight the importance of the periodic system in the scientific and technological development of the chemistry; therefore, a discussion of some applications of the periodicity of the elements for designing new materials is carried out. In this work, some periodic trends of both molecules and complex structures of materials are discussed, by selecting different cases of the chemical periodicity applied to improve and design steels with higher wear resistance, prepare refractory materials and synthesize chalcogenides glasses, among others. Finally, the proposed subjects and the regularities argued in this work are considered complementary contexts of exceptional interest to motivate the meaningful learning of the periodic table taking into account the current scientific and technological researches.

show abstract

Understanding the Uniqueness of 2p Elements in Periodic Tables

Wang

Szentpály

et al. 2020

Chemistry A European J

View full text Add to dashboard Cite

The Periodic Table, and the unique chemical behavior of the first element in a column (group), were discovered simultaneously one and a half centuries ago. Half a century ago, this unique chemistry of the light homologs was correlated to the then available atomic orbital (AO) radii. The radially nodeless 1s, 2p, 3d, 4f valence AOs are particularly compact. The similarity of r(2s)≈r(2p) leads to pronounced sp‐hybrid bonding of the light p‐block elements, whereas the heavier p elements with n≥3 exhibit r(ns) ≪ r(np) of approximately −20 to −30 %. Herein, a comprehensive physical explanation is presented in terms of kinetic radial and angular, as well as potential nuclear‐attraction and electron‐screening effects. For hydrogen‐like atoms and all inner shells of the heavy atoms, r(2s) ≫ r(2p) by +20 to +30 %, whereas r(3s)≳r(3p)≳r(3d), since in Coulomb potentials radial motion is more radial orbital expanding than angular motion. However, the screening of nuclear attraction by inner core shells is more efficient for s than for p valence shells. The uniqueness of the 2p AO is explained by this differential shielding. Thereby, the present work paves the way for future physical explanations of the 3d, 4f, and 5g cases.

show abstract

Adequacy of the new formulation of the Periodic Law when fundamental variations occur in blocks and periods

Cited by 9 publications

References 12 publications

Physical origin of chemical periodicities in the system of elements

Physical origin of chemical periodicities in the system of elements

La Periodicidad De Los Elementos Y El Desempeño De Los Materiales: Un Complemento Para La Comprensión De La Tabla Periódica

Understanding the Uniqueness of 2p Elements in Periodic Tables

Contact Info

Product

Resources

About