An element X has the following isotopic composition 200X=90%,199X=85%and202X=2%The weighted average atomic mass of the element X is closest to ______

An element X has the following isotopic composition 200X=90%,199X=85%a

1.	An element X has the following isotopic composition 200X=90%,199X=85%and202X=2%The weighted average atomic mass of the element X is closest to ______
Answer» 201u 202 u 199 u 200 u Solution :`=(200xx90) + (199xx8) + (202xx2)/(100)=199.96=200u`