Co-ordination number of Co in [Co(NH3)6]2+ is:
Correct answer: C. 6
- A. 4
- B. 5
- C. 6
- D. 8
Explanation
The coordination number is the number of donor atoms directly bonded to the central metal ion. In this complex. there are ammonia (NH3) ligands, and each is monodentate (donates one pair of electrons), so the coordination number is 6.
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Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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