The position of hydrogen in periodic table is a subject of discussion, due to similarities and dissimilarities of hydrogen with alkali metals and halogens. It is difficult to assign a specific position to hydrogen. On the basis of electronic configuration, it is suitable to place hydrogen in group 1 of periodic table. But this is not right, hence due to its abnormal behaviour. It should be assigned a separate place in the periodic table. Keeping it walk other elements a drawback of periodic table.
