Classification Of Elements And Periodicity In Properties Ques 268
Question: Which of the following are isoelectronic species- $ \overset{\oplus }{\mathop{CH_3}},(I),\overset{\Theta }{\mathop{NH_2}},(II),{{\overset{\oplus }{\mathop{NH}},}_4}(III)and,NH_3(IV) $
Options:
A) II, III and IV
B) I, II and III
C) I, II and IV
D) II and I
Show Answer
Answer:
Correct Answer: A
Solution:
[a] No of electrons in $ \overset{\oplus }{\mathop{C}},H_3 $ (I) =6+3-1=8 No. of electrons in $ {{\overset{\odot }{\mathop{NH}},}_2} $ (II) =7+2+1=10 No. of electrons in $ {{\overset{\oplus }{\mathop{NH}},}_4} $ (III) =7+4+-1=10 No. of electrons in $ NH_3 $ (IV) =7+3=10 II, III, and IV are iso-electronic
