Check the listing for details. Nihonium Element Cube. Condition: New. Listed at 53.55 USD. Nihonium Element Cube Made In USA 2x2x2 inches Radioactive symbol. No sample. Nihonium's atomic number is 113 and its symbol is Nh. It is a synthetic chemical element, and it is extremely radioactive; its most stable known isotope, nihonium-286, has a half-life of about 10 seconds. The name comes from the common Japanese name for Japan (日本, nihon) because it was discovered by a team of Japanese scientists in little is known about nihonium, as it has only been made in very small amounts that decay within seconds, and preliminary experiments in 2017 showed that elemental nihonium is not very volatile; its chemistry remains largely unexplored. This display is contained within crystal clear lucite acrylic. Made In USA 2x2x2 inches Radioactive symbol. No sample. Nihonium's atomic number is 113 and its symbol is Nh. It is a synthetic chemical element, and it is extremely radioactive; its most stable known isotope, nihonium-286, has a half-life of about 10 seconds. The name comes from the common Japanese name for Japan (日本, nihon) because it was discovered by a team of Japanese scientists in little is known about nihonium, as it has only been made in very small amounts that decay within seconds, and preliminary experiments in 2017 showed that elemental nihonium is not very volatile; its chemistry remains largely unexplored. This display is contained within crystal clear lucite acrylic.eBay integration by