137: A bohr's theory prediction of the upper limit for the number of chemical elements

The semi-classical Bohrs model, although it is an incomplete and ld theory, is one of the first approximations to the one electron atom that students learn. In this paper an answer is given using this model to a question that can often arise in introductory chemistry or atomic physics courses when dealing with the subject of the periodical table, namely if there is an upper limit for the number of chemical elements. It is hoped that the manuscript could be useful to teachers and students to learn about this question since the very first physics nd chemistry courses.