The periodic table got larger after four new elements were officially named and added to the chart. These elements were added to the periodic table a year ago, but they recently received their official names.
These new additions include nihonium, moscovium, tennessine, and Oganesson, with atomic numbers 113, 115, 117 and 118 respectively. All of the new elements are man-made and were discovered by slamming lighter nuclei into each other and then tracking the decay of the radioactive elements.
Tradition dictates those newly discovered elements be named after a place, geographical region, or scientist, according to the International Union of Pure and Applied Chemistry (IUPAC), which announced the new names. IUPAC officially accepted after a 5-month public review period. With the latest discoveries, the periodic table is now complete down to the seventh row.
Element 113, Nihonium is a highly radioactive element with an extremely short half-life. The name is derived from Japan’s name in Japanese – ‘nihon’, literally ‘the land of the rising sun’. Moscovium (Mc) is named after the Russian capital, where much of the relevant research was conducted. Tennessine (Ts) is named after the US state of Tennessee and Oganesson (Og) is named in homage to Russian nuclear physicist Yuri Oganessian, in recognition of his ‘pioneering contributions’ in elements research.