Scientific Journal of KubSAU

Polythematic online scientific journal
of Kuban State Agrarian University
ISSN 1990-4665
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Name

Kazachenko Alexandr Sergeevich

Scholastic degree


Academic rank

Honorary rank

Organization, job position

Krasnoyarsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences, Institute of Chemistry and Chemical Technology SB RAS
   

Web site url

Email

leo_lion_leo@mail.ru


Articles count: 3

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250 kb

ALTERNATIVE MODEL OF CALCULATIONS OF VALUES OF ATOMIC RADIUS

abstract 1321708051 issue 132 pp. 616 – 627 31.10.2017 ru 0
The article presents the results of the development of an alternative model for calculating the values of atomic radius. A formula was derived for calculating the atomic radius of the elements of the Periodic System of DI Mendeleev. The optimal calculation conditions for the proposed model are found. It is shown that the curve of the dependence of the value of the correction coefficient x on the atomic number of the element in form coincides with the dependence of the ionization energy on the charge number
281 kb

APPLICATION OF THE MASS-RADIAL MODEL OF CALCULATION OF ATOMIC RADIUMS FOR ISOTOPES OF CHEMICAL ELEMENTS

abstract 1311707072 issue 131 pp. 872 – 887 29.09.2017 ru 73
The article presents the results of studies of changes in the atomic radii of isotopes of the elements of the periodic table. With using the mass-radial model of calculations, the values of atomic radii for isotopes of chemical elements were obtained. It is shown that the atomic radius of different isotopes of one element is different and depends on the mass and radius of the nucleus. To study the changes in ∆Rav values in the groups and periods of the Periodic Table of Chemical Elements, the ∆Rav dependences on the period number and group number are constructed. It is found that the values depending on the number ∆Rav period / group for the d-elements lie in the low ∆Rav values for selements - in high ∆Rav values, and p-elements - in average values ∆Rav. It is shown that when the atomic nucleus is increased by 1 neutron, the atomic radius increases from 0.01 to 4.76 pm, which is due to the physical effect inside the atom
295 kb

DEVELOPMENT OF A NEW MODEL OF CALCULATIONS OF VALUES OF ATOMIC RADIUMS

abstract 1311707047 issue 131 pp. 528 – 546 29.09.2017 ru 65
The article presents the results of studies of changes in the atomic radii of the elements of the periodic table, depending on their atomic masses. It is shown that the appearance of p- and d-orbitals introduces a significant contribution to the value of the atomic radius, and the appearance of f-orbitals makes a significantly smaller contribution to the given value. A radial-mass model of calculations of atomic radii for the elements of the Periodic Table was developed. Optimal conditions for making calculations were chosen. For the first time the values of atomic radii for elements with the order number 103-120 are calculated. It is shown that the values of atomic radii for elements with the order number 103-120 are in the range from 140 to 335 picometers and regularly change in the period
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