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Identify the pairs which are not of isotopes

(i)  _{6}^{12}\textrm{X}, \:_{6}^{13}\textrm{Y}

(ii) _{17}^{35}\textrm{X}, \:_{17}^{37}\textrm{Y}

(iii) _{6}^{14}\textrm{X}, \:_{7}^{14}\textrm{Y}

(iv) _{4}^{8}\textrm{X}, \:_{5}^{8}\textrm{Y}

  • Option 1)

    i and ii

  • Option 2)

    ii and iii

  • Option 3)

    iii and iv

  • Option 4)

    i and iv 

 

Answers (1)

best_answer

As we learnt in

Isotopes -

Atoms having same atomic number but different mass number.

-

 

 i) atomic number =6, mass numbers different

 ii) atomic number =17, mass numbers different

 iii) atomic number different, mass numbers different

 iv) atomic number different, mass numbers different

\therefore clearly iii & iv do not isotopes


Option 1)

i and ii

Incorrect option

Option 2)

ii and iii

Incorrect option

Option 3)

iii and iv

correct option

Option 4)

i and iv 

Incorrect option

Posted by

Aadil

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