There are three basic modes of functional associations representation known in science: a) analytical, b) graphic, c) tabular. From the moment of its statement the periodic law required tools of expression. The table was chosen as the basic tool. There were many attempts to find an adequate form, visual representation of the law. More than 500 modifications of the periodic system are known today. Tables (> 400) predominate among them; the remaining images are various geometrical figures, analytical curves and so on. [2] [See, for example, [10]. The great variety is explained, obviously, not only by supplement of the system with new elements, but also by the objective difficulties of quasiperiodic structure representation. In most of periodic objects and events observed in nature, (for example, segmented worms, striated muscle, oscillation of a pendulum, rhythm of heart muscle contraction, change of time of day, seasons of year and so forth), the length of periods is constant or it increases in regular intervals in an arithmetical or geometrical progression, (some patterns on plants or spiral shells of some chambered mollusks). In the periodic law modification of period length is a variable value. The length of periods in the system composes neither a geometrical nor an arithmetical progression. This variable submits to the more complicated nonlinear association based on the electronic configuration of an atom. The difficulties at construction
of the periodic system of elements remind, from my point of view, of a
packing problem. How to pack the things - periods (for example, books of
a different format) on shelfs of afixed length? Hydrogen (H) and
helium (He) cannot fill a line of the first period of the traditional
table (even if hydrogen is written twice). With magnification of the period
number the arrangement of elements in its lines becomes tighter. The lanthanides
and the actinides cannot be laid (squeezed) at all into standard formats
and are born outside of the table. If we speak about theoretically predicted
superheavy elements, the problem of their arrangement is even more aggravated
(complicated).
Extended Periodic Table
Figure 1.This periodic table is extended to include element 168. The elements 113, 115, 117, and above 118 have not yet been proven to exist, they have only generic names and symbols. Materials of the site
[10] are used (adapted) by creation of the table. The length of periods
- is not a simply nonconstant magnitude - this magnitude itself varies
periodically. In each even period one observes its integration on the progressively
growing magnitude equal to double odd number {6, 10, 14..., 2 (2n-1)...);
n = 2, 3, 4...}.
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