Dramatic changes in physical properties occur on descending group 16 of the periodic table ... and the in-between elements, sulfur, selenium and tellurium, are all solids that show increasing ...

The atomic number of tellurium is 52 and the atomic number of iodine is 53, so these elements are in the correct order in the modern periodic table.

They are seeking good fortune in their hunt for an elusive entity: element 119. The periodic table looks complete, but it isn’t. The race is on to discover the table’s next row of elements ...