Question

Which has maximum EAN of the given atoms ?

$(Cr=24,Co=27,Fe=26,Ni=28)$

• A. $\left[Cr\right(EDTA){]}^{-}$
• B. $\left[Co\right(en{)}_3{]}^{3+}$
• C. $\left[Fe\right(C_2{O}_4{)}_3{]}^{3-}$
• D. $\left[Ni\right(CN{)}_4{]}^{2-}$

Answer 1

The correct option is B $\left[Co\right(en{)}_3{]}^{3+}$

$\left[Cr\right(EDTA){]}^{-}$
+1

EAN Cr =$23+12$ = $35$

$\left[Co\right(en{)}_3{]}^{3+}$
+3

EAN = $24+3\times 4$ =$36$

$\left[Fe\right(C_2{O}_4{)}_3{]}^{3-}$
+ 3

EAN = $23+4\times 3$ = $35$

$\left[Ni\right(CN{)}_4{]}^{2-}$
+2

EAN = $26+8$ =$34$