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Yet there are differences

The larger the atomic number, the more complex the electronic structure. For neutral atoms the following occupation scheme applies. [Pg.380]

The Aufbau Prinzip relies on a scheme of orbital energies. Fig. 8.17. We cannot however expect that all nuances of atomic stabilities and of the ions corresponding to them might be deduced om a single simple rule like the Aufbau Prinzip, and not from the hard work of solving the Schrodinger equation (plus also the relativistic effects. Chapter 3) individually for each particular qfstem. [Pg.380]

Even so, the consecutive occupation of the electronic shells by electrons leads to a quasi-periodicity (sometimes called the periodicity) of the electronic configurations, and in consequence a quasi-periodicity of all chemical and physical properties of the elements. [Pg.381]

Example 1. Noble gases. The atoms He, Ne, Ar, Kr, Xe, Rn have a remarkable feature, that all the subshells below and including ns np subshell are fully occupied. [Pg.381]

Electronic Motion in the Mean Field Atoms and Molecules [Pg.382]


This leaves us with the question of how would one understand the existence of an FS in a sample consisting of a 2 nm wide island of an SC embedded in (and eventually connected by) a bad exotic metal. Thus it is necessary to understand the meaning of the FS within the scale in which it exists. It seems to be established that a quasiparticle peak is the signature of the SC islands yet there are different views on the meaning of this peak. [Pg.282]

The basic idea describing an amorphous solid is the continuity between the liquid and the solid states, yet there are different rates of variations of a given physical property with temperature. [Pg.439]

A decision on the decoration of the lattice has not yet been made. Two variants are depicted in Fig. 8.42a and Fig. 8.42b, respectively. Thus there are different variants of lattice models. [Pg.191]

As noted above, an element is a substance that contains only one kind of atom (although it may contain different isotopes of that element). There are 91 elements known to occur in nature, and yet there are many thousands of inorganic compounds, and several millions of organic compounds. Clearly,... [Pg.33]

Expert systems, and artificial intelligence in general, are new fields whose breadth of application, and indeed, whose exact definitions, are not yet completely settled. It is sometimes claimed that no two experts on artificial intelligence agree exactly on what its definition is. Definitions of expert systems at least agree on the necessity for expertise, but even here there are differences in emphasis and in priority. [Pg.75]

A conformation is the different special arrangement of a ligand s atoms that result from rotation about a single bond a specific conformation is a conformer. Unlike constitutional isomers, different conformations cannot be isolated because they quickly interconvert, yet there are several computational methods to determine the possible conformations a molecule may possess. The energy of... [Pg.145]

The Optional Reward proposal is in many ways very similar to Advanced Purchase Commitments, and yet there are important differences. Like the Advanced Purchase Commitment plan, the Optional Reward proposal is a method for increasing overall incentives as well as increasing access. One key difference is that the Advanced Purchase Commitment plan is suited only to drugs whose technical characteristics can be described in advance ... [Pg.85]

We can go yet another step further in this cautious tapping at the higher domains. One point is linked to the trivial observation made earlier, that arose is not a rose for a hsh. In fact, this is tantamount to saying that there are as many realities as there are different observers, since each of them will have a different internal structure, and therefore a different co-emergence with the environment. When extrapolated, this takes us to Varela s notion of groundless-ness, the lack of an objective, unique reahty and to the even more complex concept of the simultaneous existence of many different worlds. [Pg.174]

In the case of addiction, we know a great deal about the neurobiological substrate of the core cases. Some of the borderline cases are likely to prove very different. Yet there are some causal mechanisms common to chemical and behavioral addictions, notably those that are linked to the axvareness of being addicted. These mechanisms generate secondary features of phenomena that are linked by analogy rather than by common causal mechanisms. [Pg.245]

For while all bodies are composed of the four elements, that is, of heat, moisture, earth and air, yet there are mixtures according to natural temperament which make up the natures of all the different animals of the world, each after its kind. Therefore, if one of these elements, heat, becomes predominant in any body whatsoever, it destroys and dissolves all the others with its violence.. . Again, The reason why lime makes a solid structure on being combined with water and sand seems to be this that rocks like all other substances are composed of the four elements. Those which contain a larger proportion of air are soft, of water, are tough from the moisture, of earth, hard, of fire more brittle. Therefore, if limestone without being burned is merely pounded up small and then mixed with... [Pg.131]

The question of determinateness presents itself as follows Let the initial (t = 0) values of all the macroscopically independent macroscopic variables be given the equations of macroscopic physics (thermal and hydro-dynamic equations, etc.) show that these variables evolve deterministically with t 0. Yet there are infinitely many different probability densities ( ")t = 0 which have the moments, etc., coinciding with the set of given initial macroscopic values. Each evolves (by Liouville s equation) differently, and hence may induce a different set of macroscopic expected values at / > 0. By what principle of natural selection is the class of probability densities so restricted as to restore macroscopic determinacy ... [Pg.39]

There are differences among these plants in the leaves, stems, and, most important, the resin. The resin content determines the the effective strength of a hemp preparation yet the resin amount can vary greatly from plant to plant. Hashish, a more concentrated form of resin, is about eight times stronger than marijuana. Cannabis bred specifically for industrial use with little or no... [Pg.15]


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