Identify the pairs which are not of isotopes?

(i) ₆X¹², ₆Y¹³

(ii) ₁₇X³⁵, ₆Y³⁷

(iii) ₆X¹⁴, ₇Y¹⁴

(iv) ₄X⁸, ₅Y⁸

 

 

Correct Answers: (iii) ₆X¹⁴, ₇Y¹⁴   (iv) ₄X⁸, ₅Y⁸

Explanation: Isotopes are the atoms having same atomic number but different atomic mass number.