CPB Budapest 2017

It was van den Broek who first in 1913 suggested that the charge in the atomic nucleus expressed in elementary charge units (e) is equal to the atomic number Z. The atomic number Z was originally introduced as a serial increasing number assigned to the known elements when these are sorted Atoms: Rutherford ´ s Atom Model according to increasing atomic weight (the periodic table of elements proposed by Dmitrij Iwanowitsch Mendelejew (1834-1907) in 1869).

The definitive interpretation of Z was achieved by Henry Moseley (1887- 1915).