An element, \( X \) has the following isotopic composition : \( { }^{200} X: 90 \% \)  &nbs...

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An element, \( X \) has the following isotopic composition :
\( { }^{200} X: 90 \% \)       \( { }^{199} X: 8.0 \% \quad{ }^{202} X: 2.0 \% \)
The weighted average atomic mass of the naturally occurring element \( X \) is closest to
(a) \( 201 \mathrm{amu} \)
(b) \( 202 \mathrm{amu} \)
(c) \( 199 \mathrm{amu} \)
(d) \( 200 \mathrm{amu} \)
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