<Tr> <Td> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> </Td> </Tr> <Ul> <Li> </Li> <Li> </Li> <Li> </Li> </Ul> <P> Alternative periodic tables are tabulations of chemical elements differing significantly in their organization from the traditional depiction of the periodic system . Several have been devised, often purely for didactic reasons, as not all correlations between the chemical elements are effectively captured by the standard periodic table . </P> <P> Alternative periodic tables are developed often to highlight or emphasize different chemical or physical properties of the elements which are not as apparent in traditional periodic tables . Some tables aim to emphasize both the nucleon and electronic structure of atoms . This can be done by changing the spatial relationship or representation each element has with respect to another element in the table . Other tables aim to emphasize the chemical element isolations by humans over time . </P>

Are there other representations of the periodic table