Answer: 4.
- A 4
- B 2
- C 6
- D 8
Correct answer: A. 4
Explanation: Four chloride ligands surround Pt<sup>2+</sup>, giving a coordination number of 4 (square planar).
The three common coordination geometries: octahedral (6 ligands), tetrahedral (4 ligands), and square planar (4 ligands in one plane).
Concept context
Study of compounds where a central metal atom is bonded to surrounding ligands. Covers nomenclature, types of isomerism, bonding theories (VBT, CFT), and applications in medicine, photography, and industry.