A radioactive transuranic element that is a p-block transactinide element. a.n. 115, mass number of the most stable isotope 290, with a half-life of about 0.8 seconds. Moscovium has four main isotopes. It was discovered in the 2000s using a nuclear reaction between americium-243 and calcium-48. It also results when tennessine undergoes alpha decay.

https://www.webelements.com/moscovium/ Information from the WebElements site