Thomas Carnelley died aged 36 on 27 August 1890 as the result of an internal abscess ... Up until this point the atomic number simply referred to an element’s positioning in the periodic table, and ...

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.

Want to learn more about this centerpiece of chemistry? Take your pick from this collection of links about elements and the periodic table! Build an element ball, solve periodic puzzles, and check out ...