Logic of the Alexander Arrangement of Elements
Chemical Element System Model
By employing the third dimension for accuracy and motivation,
the AAE 3D system model;
adheres to the Mendeleev's Periodic Law's: "
...arranged according to their atomic mass
" requirement, displaying a continuous and contiguous series of element data
- in boxes, periods, and blocks as well.
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displays the Main Group blocks connected from top to bottom and end to beginning of periods for enhanced trends observation and understanding,
permits correct placement of the f-block within the main body of the table, while keeping it a physical entity as well - hands-on instead of orphaned,
uses an element databox downslant in the p-block, connecting each period's last element to the first of the next period, following the scientifically accepted s-p-d-f block sequence, and a tremendous trends learning aid,
is a reference and learning tool that most closely reflects the continuous element line paradigm of very first periodic table by de Chancourtois, the elements on a continuous helix, or spiral,
employs student interaction to see and touch, thus learn all the element and block relationships in a tactile as well as a visual way, and
has an attractive, novel, and motivational appearance of what is more accurate than any other known element arrangement.
Logic of the standard flat PERIODIC TABLE
Limiting the periodic table to two dimensions provides a valuable view of all the elements at one time, handy for production convenience and wider distribution. No flat chart can, however;
adhere to Mendeleev's Periodic Law's: "
...arranged according to their atomic weights...
unless arrows, asterisks, or lines are employed at elements 1, 2, 3, 4, 5,10, 11, 18, 19, 36, 37, 54, 55, 56, 57, 70, 71, 86, 87, 88, 102, and 103
to imply adjacency of sequential elements,
instead of the scientifically accepted s-p-d-f-, element blocks are in s-d-p- sequence, with the f-block completely detached,
the Main Group blocks appear at opposite edges of the chart, making trends observation and understanding more difficult by wide separation of key element groups,
is like geographical maps, which are vital working guides however distorted they may be in map projections of the whole globe. Faults are inherent in flat representations of a 3D object. Representations of Earth have polar region misinformation and/or incorrect relative continent size/shape. Mapping the whole of the chemical elements to a 3D tabular format results in similar problems: a dozen + numeric sequence breaks and gaps, separation of the Main Group blocks, total displacement of the f-block, BUT
is VITAL for reference and work in chemistry, permitting observation of all elements at one time, and is as necessary as the outdated Bohr atom shell concept for instruction, ...but more student acceptable when immediately preceded by a model of the Periodic Law, the Alexander Arrangement of Elements.