Which Two of the Ions Below Have the Same Number ${ }_{53}^{127} \mathrm{I}^{-}$

question 20

Multiple Choice

Which two of the ions below have the same number of electrons?
${ }_{53}^{127} \mathrm{I}^{-}$ , ${ }_{50}^{119} \mathrm{Sn}^{2+}$ , ${ }_{82}^{207} \mathrm{~Pb}^{2+}$ , ${ }_{82}^{207} \mathrm{~Pb}^{4+}$ , ${ }_{56}^{137} \mathrm{Ba}^{2+}$

• A) \({ }_{53}^{127} \mathrm{I}^{-}\) and \({ }_{56}^{137} \mathrm{Ba}^{2+}\)
• B) \({ }_{53}^{127} \mathrm{I}^{-}\) and \({ }_{50}^{119} \mathrm{Sn}^{2+}\)
• C) \({ }_{82}^{207} \mathrm{~Pb}^{2+}\) and \({ }_{56}^{137} \mathrm{Ba}^{2+}\)
• D) \({ }_{50}^{119} \mathrm{Sn}^{2+}\) and \({ }_{56}^{137} \mathrm{Ba}^{2+}\)
• E) \({ }_{82}^{207} \mathrm{~Pb}^{2+}\) and \({ }_{82}^{207} \mathrm{~Pb}^{4+}\)

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