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Some Basic Concepts of Chemistry — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistrySome Basic Concepts of Chemistry1 Mark
MCQ
It can be shown using mass spectrometry that the ratio of naturally occurring chlorine $-35$ to its isotope chlorine $-37$ is $3 : 1$. Assuming that no other isotopes existed, what would be the atomic weight of chlorine?
  • ✓
    $35.5$
  • B
    $37.5$
  • C
    $36.6$
  • D
    None of the above
✓

Answer

Correct option: A.
$35.5$
Atomic weight of chlorine $=\frac{3\times35+1\times37}{4}=35.5$

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