Sunday, December 6, 2015

  And you can arrange the items in the table to perform, and laws and regulations, and so that the number of elements have not changed?
Yes possible if lanthanides placed in a column under lanthanum, hafnium and lutetium will follow already horizontally. Also done with actinides, but the table turns ugly.
  Build a simple graph of the results Chadwick, we see that for platinum he was to receive a charge equal to the value of about 80.
  Therefore, the charge of the nucleus of platinum and close to it the elements to check.

Thursday, September 3, 2015

Tuesday, August 25, 2015

In quantum mechanics, the default for each subsequent element nuclear charge increases in the center unit, and the filling is spdf-electron configurations. We have a nuclear charge is on the surface, because the number of protons and number of neutrons in the nucleus such that on the surface of the kernel should be protons and neutrons, and neutrons inside only, that is, on the surface of the nucleus formed some shell. In addition, protons must build, as well as their e-coat attracts. The question can be considered in the calculation of the core point and for how long?

Thursday, July 16, 2015

  Recent discovery of the chemical elements.

  The unknowns are numbers 72-75 and 108-111.

Thursday, July 2, 2015

   Of course, the table of the elements has not changed, but perhaps it is important to know the true charge of the atomic nuclei of uranium and plutonium used in nuclear power plants.

Monday, April 13, 2015

 That is the atomic number, which coincides, as suggested by the Dutch scientist Antonius Van den Broek, with the magnitude of the positive charge on the nucleus of the atom, became the basis for classification of chemical elements. In 1920 the English physicist James Chadwick experimentally determined the nuclear charge of copper silver and platinum, obtaining for them the values ​​of 29.3, 46.3 and 77.4, respectively, which almost coincided with their atomic numbers 29, 47 and 78.