Which period is the incomplete period in the periodic table?

The seventh period of the Periodic Table is, in fact, NOT incomplete. If you found this question on an old book, it is outdated. The only incompleteness (a few years ago) was the IUPAC confirming and naming of the elements 113, 115, 117 and 118. read more

Elements after uranium on the periodic table have been synthesized for the past few decades, but there were always a few missing blocks in the periodic table. These elements, with atomic numbers of 113, 115, 117, and 118 comprise the missing parts of period 7 – the lowest row – of the periodic table. read more