Bohr's other major contributions, in addition to quantum theory, include his theoretical description of the periodic table of elements around 1920, his theory of the atomic nucleus being a compound structure in 1936, and his understanding of uranium fission in terms of the isotope 235 in 1939.
+ 13 Sa gayon ay itiningin ni Abraham ang kaniyang mga mata at tumanaw at naroon, may kalayuan sa dakong harapan, may isang barakong tupa na ang mga sungay nito ay nasabit sa isang palumpungan.ParaCrawl Corpus ParaCrawl Corpus