He develops the theory of the atom on the basis of which is created the planetary model of the atom and quantum conceptions. In 1923, based on his model, he is the first to succeed to explain Mendeleev’s periodic table of elements and in 1939, together with J.A. Wheeler, he develops the theory of the nuclear fission – the process when a huge amount of nuclear energy is released. A little known fact is that at the end of the WWII, he lives and works in the USA and participates in the Manhattan Project for the building of a nuclear bomb. He receives a Nobel Prize in 1922 – one year after Albert Einstein’s Nobel Prize. The hologram mark on the banknote is a model of an atom with electrons that is revolving around the nucleus.