Question

Pick out the isoelectronic structures from the following

$\underset{I}{CH_{3}^{+}}$ $\underset{\text{II}}{H_{3}O^{+}}$ $\underset{\text{III}}{NH_{3}}$ $\underset{\text{IV}}{CH_{3}^{-}}$

• A. I and II
• B. I and IV
• C. I and III
• D. II, III and IV

Answer 1

Answer: (D)

II, III and IV

Answer 2

$CH_{3}^{+} = 6 + 3 - 1 = 8e^{-},$

$H_{3}O^{+} = 3 + 8 - 1 = 10e^{-},$

$NH_{3} = 7 + 3 = 10e^{-},$ $CH_{3}^{-} = 6 + 3 + 1 = 10e^{-}$