Moscovium

Moscovium is named after the Moscow region of Russia, home to the Joint Institute for Nuclear Research in Dubna where it was first synthesized. Created in 2003 by a Russian-American collaboration between the Dubna team and scientists at Oak Ridge National Laboratory in Tennessee, moscovium was produced by bombarding americium with calcium atoms.

Moscovium is a superheavy element that exists for only fractions of a second. Its most stable isotope has a half-life of about 0.65 seconds. Scientists predict moscovium would behave somewhat like bismuth, its lighter neighbor in the same column, but relativistic effects might make it quite different. No bulk properties have been measured — everything known comes from detecting its radioactive decay signatures.

Moscovium's symbol 'Mc' is a distinctive two-letter element in Spellement. It can help spell words starting with 'mc' like 'McDonald' (proper nouns aside), and partial emphasis allows using 'm' or 'c' individually — both common consonants that provide flexibility for building creative element-based word spellings.