An element X has the following isotopic composition ""^(200)X = 90 %, ""^(199)X=8 % and ""^(202) X=2 %, The weighted average atomic mass of the element X is closest to

An element X has the following isotopic composition ""^(200)X = 90 %,

1.	An element X has the following isotopic composition ""^(200)X = 90 %, ""^(199)X=8 % and ""^(202) X=2 %, The weighted average atomic mass of the element X is closest to
Answer» 201u 202u 199u 200u Solution :`=((200 XX 90) + (199xx8) + (202xx2))/100 =199.96=200u`