09.19.23

Elements Atomic Periodic

Many times when we are studying the periodic chemical properties in the periodic table of the chemical elements in them we come across with some exceptions to the rules of regularity of some elements of transistion. This work has as objective to explain of form sucinta these exceptions. One of them says respect to the atomic ray. What if it knows regarding the atomic ray is that it generally diminishes of the left for the right in the periodic table in one same which had period, to the increase of the nuclear attraction with the addition of the atomic number of atoms. However when we look at this property for the transistion elements, we observe for example that of the right left pra in the first series of transistion of the periodic table the ray diminishes (that is, follows the general trend) until nickel, and later occurs an increase in the atomic ray when it is transferred to copper. The question is: Why this happens, since correct for the general trend the age to diminish? What it happens in this in case that, and for the too much series of transistion, it is that the fulfilling with electrons of the orbital ones of type d increases the shield effect on external electrons of the valence layer. In nickel this increase of the shield effect does not even surpass the effect of the addition of the nuclear attraction with the increase of the atomic number, however, when the electron number is transferred of nickel for copper d already is enough so that the shield effect surpasses the effect of the increase of the nuclear attraction, in such a way that the electrons most external of the periodic table is little strong attracted by the nucleus, thus being able to be more distant of the nucleus, what greater results in an atomic ray. In figure 1 we have a representative image that it illustrates copper and nickel atoms so that let us can have a notion of the difference of size between two atoms..

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03.14.18

Integrated System

It sees if, therefore, that with the advent of Law 8987/95 that it regulates the justinian codes of concession permission, the difference practically enters these does not exist more, time that the permission left to have legal nature of administrative act, passing the administrative contract, as well as the concession. The INSTALLMENT OF the SERVICE OF COLLECTIVE TRANSPORT OF $FORTALEZA the delegation of the installment of the public service of the city of $fortaleza was made to the private initiative for the regimen of Concession. The private initiative generates this public service, but it does not make it to its exempts alvedrio. The city hall, through the ETTUFOR, manages and fiscalizes this service. Valley to remember that the ETTUFOR is today a total public company. In 1990, a cooperation accord was signed technique enters the Municipal City hall of $fortaleza and the Company of Transporte Coletivo (CTC), making possible the delegation of the planning activities and operational control of the System of Public Transport of Passengers for bus for the CTC. It had a concern with the renewal and systematic inspection of the fleet of bus and with implantation of the managemental and operational control, as well as with the routine services of maintenance of itineraries and sizing of the lines of existing buses. To complement the system of operational control they had been implanted, in strategical points of the main corridors of public transport, a set of control cabin, in which employee of the CTC they inside verified and they controlled the ticket of the buses of the specified schedules, making possible the verification of the data informed for the Operting companies. (Source: Paulo Coelho). Parallel to the works of implantation of the control and management of the System, the project of the Integrated System of Transports was developed, that had as main action the inauguration of the Terminal Antonio Heifer and the Terminal of Messejana.

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09.11.13

The Success

Each professor must look for optimum to be able to make to its contents it work and having advantage. For certain he does not have doubt of that education favors the understanding in the way as if makes science. The professor engaged in task to teach will see that the experimental lessons can become a privilegiado instrument students to learn them: Observar; Discriminar; Organizar; Classificar; Medir; Experimentar; Avaliar. It is possible that same in a school with little experimental tradition the pupils pass: Desenvolver innovative abilities and techniques; Passem to use and to calibrate instruments; Passem to use a microscope; Possam to prepare solutions. To propitiate to the student concrete experiences that extend its capacity to establish relations and to understand concepts and principles. Propositadamente must be given priority so that the pupils start to understand me the propitious mentos for the valuation of the life, in its diversity, and the important development of the attitudes and valores, in science and the collective work.

4 SCIENTIFIC EXPERIMENT Despite it has discords how much to some of the cited aspects, justifies the use of the experimental activity as resource capable to assure one efficient learning of the pertaining to school contents. Thus, the experiment can be carried through by the professor, as demonstration, and for the proper pupils, according to a script more or less detailed and previamente elaborated. The experiment must have a previous assay, must be carried through of anticipated form for the professor in order to guarantee the success at the moment of the execution. As general rule first it is used to explain the subject aiming at to introduce and to explore the subjects and, mainly, to motivate the pupil on ' ' que' ' he will be boarded. Of beforehand it must be thought and to have an inductive character, where the students can control 0 variable and discover or redescobrir functional relations between them, or deductive, when they have the chance to test certain predictions of the theory.

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