Moscovium is a molecule.
Moscovium is a superheavy synthetic element with symbol Mc and atomic number 115 . Moscovium is an extremely radioactive element : its most stable known isotope , moscovium-290 , has a half-life of only 0.8 seconds . It is a member of the 7th period and is placed in group 15 as the heaviest pnictogen , although it has not been confirmed to behave as a heavier homologue of the pnictogen bismuth .