Nihonium is a synthetic element with the atomic number 113 and the symbol Nh. It was first officially recognized in 2016 and is named after Nihon, which means "Japan" in Japanese, honoring the country where it was discovered. Nihonium is classified as a post-transition metal and is part of the p-block of the periodic table. Due to its short half-life, nihonium is highly unstable and has only been produced in minute amounts in laboratories. Its most stable isotope, Nh-286, has a half-life of about 20 milliseconds. As a result, there is limited information about its chemical properties, but it is expected to behave similarly to other elements in its group, such as thallium.