Question 1
Question detail
Define a transition metal and provide an example.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
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exam_style
Style
Topic
Transition metals (A-level only)
Question
Define a transition metal and provide an example.
Answer
A transition metal is defined as a d-block element that forms at least one ion with an incomplete d subshell. An example of a transition metal is iron (Fe), which can form ions such as Fe²⁺ and Fe³⁺.
Explanation
This answer is strong because it clearly defines the term 'transition metal' and provides a specific example, demonstrating understanding of the concept. The question tests the student's ability to recall and explain the definition of transition metals.
Common mistake
Misunderstanding Redox Changes
Students often confuse oxidation and reduction processes, thinking that both involve the same changes in transition-metal ions.
To clarify, remember that oxidation involves the loss of electrons (increase in oxidation state), while reduction involves the gain of electrons (decrease in oxidation state). For example, in the reaction of Fe²⁺ to Fe³⁺, Fe is oxidized as it loses an electron. Therefore, oxidation state changes must be tracked accurately to explain redox processes involving transition-metal ions.
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