Question

Which of the following are isoelectronic species?
(i) NH\textsubscript{3 (ii) CH\textsubscript{3}\textsuperscript{+} (iii) NH\textsubscript{2}\textsuperscript{--} (iv) NH\textsubscript{4}\textsuperscript{+}
Choose the correct answer from the codes given below}

• A. (i), (ii), (iii)
• B. (ii), (iii), (iv)
• C. (i), (ii), (iv)
• D. (i), (iii), (iv)
• E. (ii), (iii)

Hint:

Most stable small molecules containing 2nd-row elements (like $N, O, F, Ne$) often aim for 10 total electrons to satisfy the octet rule ($2 + 8 = 10$).

Answer 1

The Correct Option is D