Question

Which one of the following constitutes a group of the isoelectronic species ?
A. `CN^- , N_2 , O_2^(2-), C_2^(2-)`
B. `N_2, O_2^(2-), NO^+ , CO`
C. `C_2^(2-), O_2^(-), CO,NO`
D. `NO^(+), C_2^(2-), CN^(-), N_2`

Answer 1

Correct Answer - D
`CN^(-)` =6+7+1= 14 `e^-`
`N_2` =8+8+2= 14 `e^-`
`O_2^-` =8+8+2= 16 `e^-`
`C_2^(2-)` =6+6+2= 14 `e^-`
`O_2^(-)` =8+8+1= 17 `e^-`
`NO^(+)` =7+8-1= 14 `e^-`
CO =6+8= 14 `e^-`