Simon Pegg is a producer and an actor.
Nihonium -LRB- 113Nh -RRB- is a synthetic element .. Nihonium. Nihonium. synthetic element. synthetic element. Being synthetic , a standard atomic weight can not be given and like all artificial elements , it has no stable isotopes .. standard atomic weight. standard atomic weight. The first isotope to be synthesized was 284Nh as a decay product of 288Mc in 2003 .. isotope. isotope. decay product. decay product. The first isotope to be directly synthesized was 278Nh in 2004 .. isotope. isotope. There are 6 known radioisotopes from 278Nh to 286Nh , along with the unconfirmed 290Nh .. The longest-lived isotope is 286Nh with a half-life of 19.6 seconds .. isotope. isotope. half-life. half-life