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An element X has the following isotopic ...

An element X has the following isotopic composition:
`.^(200)X:90% .^(199)X:8.0% .^(202)X:2.0%`
The weight average atomic mass of the naturally occurring element X is closest to

A

201u

B

202 u

C

199 u

D

200 u

Text Solution

Verified by Experts

The correct Answer is:
D
Weight of `^.(200)X=0.90xx200=180.00u`
Weight of `.^(199)X=0.08xx199=15.92u`
Weight of `.^(202)X=0.02xx202=4.04u`
Total weight `=199.96~~200u`
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