Question

An element, X has the following isotopic composition
2oX: 90 %, 10%: 8.0 %, 292% : 2.0%,
The weighted average atomic mass of the naturally - occurring elements X is closest to
a) 199 amu
1200 amu
c) 201 amu
d) 202 amu​

Answer 1

The question you asked has some mistake but the question i know, according to it answer must be 199 amu