<Ul> <Li> Beyond period 7 </Li> </Ul> <Li> Beyond period 7 </Li> <Ul> <Li> Fricke <Ul> <Li> large cells </Li> </Ul> </Li> <Li> Pyykkö </Li> </Ul> <Li> Fricke <Ul> <Li> large cells </Li> </Ul> </Li>

Who came up with the first periodic table