Question 1
Question detail
What is the coordination number of a complex ion?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Transition metals (A-level only)
Question
- A. The number of ligands bonded to the central metal ion
- B. The total number of electrons in the d subshell
- C. The number of oxidation states of the metal
- D. The number of unpaired electrons in the metal
Answer
The number of ligands bonded to the central metal ion
Explanation
The coordination number of a complex ion refers to the number of ligands that are directly bonded to the central metal ion, which influences the geometry and properties of the complex.
Common mistake
Misunderstanding Transition Metals
Students often confuse transition metals with all d-block elements, thinking all d-block elements are transition metals.
A transition metal is specifically defined as a d-block element that forms at least one ion with an incomplete d subshell. To clarify, remember that not all d-block elements meet this criterion. For example, zinc is a d-block element but is not considered a transition metal because it only forms Zn²⁺ with a complete d subshell.
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