Arrangements of the tables

Group 3 of the Periodic Table consists of the elements scandium, yttrium and either lanthanum or lutetium, depending upon the preferred arrangement of the Table. Group 3 elements have the outer electronic configuration ns2 p, and invariably their solution chemistry is that of the + 3 state. In this text, treatment of both La and Lu is carried out in Chapter 8, which deals with the f-block elements. Lanthanum and lutetium represent the first and last members of the lanthanide series. 

Other practical information can be obtained from the periodic table. The arrangement of the table helps you determine the physical state of an element whether the element is synthetic or natural and whether the element is a metal, nonmetal, or metalloid. 

Modern arrangements of the table, may be considered in t wo classes, those using a lint surface ami these using three dimensions, Only the more important suggestion,s in each class can be considered here. 

The bond-length and valence-angle data available at present are summarized in Tables II and III. Different workers have different ways of estimating the accuracy of their own results, and the arrangement of the Tables is such that the more accurate results are presented first. 

The following general rules are observed in the arrangement of the tables ... 

The arrangement of the tables corresponds essentially to that of chapter 5 in Vol. II/9cl. The radicals are divided into two major groups. 

Much has been written on the Methode de nomenclature chimique, and much has been said in praise of the Tableau of the Methode and its outstanding significance in the history of early modem chemistry. But despite this unanimously shared assessment and appreciation, no thorough and exhaustive analysis of the Tableau s classification of chemical substances has been presented by any historian of science up to now. Only the first column of the table, the column for simple substances, was hitherto subjected to closer inspection. Thus our analysis of the table s classification cannot build on the results of earlier investigations, but has to start from scratch. This means we first have to provide an overview on the table to which we can refer and return whenever desirable in the course of the subsequent investigations. In what follows we will first describe the arrangement of the table and then analyze its classification s formal features. 

The following tables 2.2.1, 2.3.1 and 2.4.1 show data on densities (or specific gravities) of ternary sy stems with one of the components being water. Thus the input into the tables has two variable components Xj and Xj similar to the binary-sy stems. For the sake of thoroughness the water is listed in the input of each table. However, since it has no bearing on the arrangement of the tables it is always listed last. 

An index should be usable with a minimum of effort on the reader s part Searching can be facilitated to some extent by proper choice of indexing procedure and arrangement of the table but it is not possible to anticipate all potential interests and needs of the readers. The primary consideration in design of the table was to assign each compound unambiguously to its position in the file so that all data and references are collected in one place, and so that the user will either find the polymer of interest direcdy or know that it is not listed. 

The list of compounds included here is as comprehensive as in the previous volumes of the series. Not included are magnetic data for perovskites, spinels, garnets and hexagonal ferrites having certain special types of crystal structure, since these are collected in full detail elsewhere [30, 32, 32a, b, c]. For more details on contents and arrangement of the tables, the reader is refered to section 1.1.4 below. 

Basic changes in theory, definition, and designation of internal and external magnetic coupling parameters have not occurred in the past ten years. Therefore the overall-disposal and arrangement of the table of magnetic constants of polyatomic molecules in Vol. 11/19 is retained. A leading factor of -1 was, however, introduced in the spin-rotation interaction hamiltonian, see eqs. (1 a) and (2a) below. The reason for this will be outlined later in connection with eq. (4a). 

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