The EAN of cobalt in the complex ion [Co (en)2Cl2]⊕ (a) 27 (b) 36�

1.	The EAN of cobalt in the complex ion [Co (en)2Cl2]⊕ (a) 27 (b) 36 (c) 33 (d) 35
Answer» Correct Answer is: (b) 36 Effective atomic number = normal atomic number - oxidation state of the atom + (2 x coordination number) So here, the atom is Cobalt (Co) Atomic number =27 Oxidation state of Co in this compound is +3 (Because of 3 Cl atoms) Coordination number is 6 So EAN = 27 - 3 + (2 x 6) = 24 + 12 = 36

The EAN of cobalt in the complex ion [Co (en)2Cl2]⊕ (a) 27 (b) 36 (c) 33 (d) 35

Answer»

Correct Answer is: (b) 36

Effective atomic number = normal atomic number - oxidation state of the atom + (2 x coordination number)

So here, the atom is Cobalt (Co)

Atomic number =27

Oxidation state of Co in this compound is +3

(Because of 3 Cl atoms)

Coordination number is 6

So EAN = 27 - 3 + (2 x 6)

= 24 + 12

= 36