What is the coordination number of Pt in [PtCl(NO2)(NH3)4]
Correct answer: C. 6
- A. 2
- B. 4
- C. 6
- D. 7
Explanation
The coordination number of Pt in [PtCl(NO2)(NH3)4] is 6 because this compound has six ligands attached to the central Pt atom: one chloride (Cl), one nitrite (NO2), and four ammonia (NH3) molecules. Each of these ligands donates a pair of electrons to the platinum, contributing to the coordination number. Options A, B, and D are incorrect because they do not account for the total number of ligands bonded to the Pt atom.
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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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