about numbers of elements
The table is constructed according to Mendeleev's periodic law and the rules of the Dutch scientist Van den Broek,.
According to Table I built in elements of the chemical elements, starting from hafnium nuclear charge increases. Are the any Laboratory James Chadwick repeated experiments to measure the charge of the atomic nuclei? It is desirable to measure nuclear charges from silver, hafnium and like cheaper, lead. It is important for uranium, which is used in nuclear power plants.