Solve this multiple-choice question and choose the correct option.

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Inorganic chemistry (periodic table): The metals Fe, Co, and Ni are best classified as what? Consider their d-block character and typical properties. Choose the correct classification.

Difficulty: Easy

Transition metals
Main group metals
Alkali metals
Rare metals

Correct Answer: Transition metals

Explanation:

Given data

Elements: Fe, Co, Ni (atomic numbers 26, 27, 28).

Concept/Approach These are d-block elements with partially filled d-subshells in common oxidation states, fitting the definition of transition metals.

Final Answer Transition metals

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