AN important result of the development of Moseley's atomic number rule has been the impetus it has given to the search for missing elements. It is true that later arrangements of the Periodic Table ...

The newest, heaviest element has been confirmed under laboratory conditions, and its synthesis could help produce even heavier cousins with all-new useful properties. Share on Facebook (opens in a new ...

The discovery of a number of trans-uranium elements – elements heavier and with an atomic number greater than that of uranium (92), the heaviest naturally stable element – has been contested with ...