Final answer:
The RIKEN institute in Japan named element 113 Nihonium (Nh), symbolizing its discovery by Japanese researchers and following the tradition of element naming by discoverers, as approved by IUPAC.
Step-by-step explanation:
The Japanese Research Institute that has earned the right to name the element with atomic number 113 is RIKEN. The element was named Nihonium, represented by the symbol Nh, after the Japanese word Nihon, meaning Japan. The International Union of Pure and Applied Chemistry (IUPAC) officially recognized this name, following the tradition that the discoverer of a new element may propose its name. Nihonium is one of the synthetic elements found at the bottom of the periodic table and is known for its instability, generally existing for less than a second before breaking apart.