MHT CET 2023 Chemistry question

Chemistry Classification of Elements and Periodicity in Properties MHT CET 2023

Which of the following species is NOT isoelectronic with neon?

(A)
(B)NaCorrect
(C)
(D)

Answer: (B)

Solution

Neon (Z = 10) has 10 electrons. Count electrons in each species: = 8 + 2 = 10; Na (neutral atom) = 11; = 12 - 2 = 10; = 13 - 3 = 10. Isoelectronic species have the same

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Question ID VK-095308