Element 115 received the name moscovium by the International Union of Pure and Applied Chemistry (IUPAC) in June 2016. Moscovium has the symbol Mc. The element is named for the Moscow region—the Joint Institute for Nuclear Research, where the element was discovered, is located in Dubna, about 75 miles (125 km) north of the city of Moscow.
New IUPAC guidelines formulated in 2016 require new elements be named after either a mythological character or concept (or an astronomical object named after such a mythological concept), a mineral, a place, or a scientist. Elements in columns 1–16 of the periodic table take the usual suffix -ium. Those in column 17 take the suffix -ine, and those in column 18 the suffix -on. Moscovium is in column 15, hence the -ium ending. Of course, older names for elements may not conform to these guidelines.
Source: “IUPAC is Naming the Four New Elements Nihonium, Moscovium, Tennessine, and Oganesson.” IUPAC press release. 8 June 2016.
Copyright 1997-2017, by David Wilton