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xpda [xpda.com] writes:

The International Union of Pure and Applied Chemistry (IUPAC) has confirmed [iupac.org] the discovery of elements with atomic numbers 113, 115, 117, and 118, completing the seventh period (row) of the periodic table of elements. It is somewhat impractical to use these elements in manufacturing, as it takes about 10^18 particle collisions to create one atom [latimes.com] of these elements, and it exists only a fraction of a second before decaying into other elements. These elements cannot be observed directly. They are detected only by their decay products.

Elements [wikipedia.org] of Period 8 (row 8 in the Periodic Table [wikipedia.org]) have been predicted, but not yet synthesized.

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