Question

what are the limitations of mendeleeffs periodic table how could the modern periodic table overcome the limitations of mendeleeffs table

Answer 1

electronic configuration of hydrogen resembles that of alkali metals . Like alkali metals hydrogen combine with halogens ,oxygen, and sulphur to form compounds having similar formulae .on the other hand just like halogens ,hydrogen also exist as diatomic molecules and it combines with metals and non metals to form covalent bond .there is not fix position of hydrogen