Question

What is the EAN of $[Al(C_4O_4)_3]^{3-}$ ?

• A. 28
• B. 22
• C. 16
• D. 10

Answer 1

Answer: (B)

22

Answer 2

Effective atomic number EAN = Atomic number - oxidation number $+$ $2 \times$ coordination number For $\left[ Al \left( C _{2} O _{4}\right)_{3}\right]^{3-}$ $Z=13$ $ON =3$ $C N=6$ $\therefore$ EAN $=13-3+2 \times 6=22$