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Which one of the following statements is incorrect about transition elements ?

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Lanthanum is not a transition element but is a lanthanoid

The transition element with smallest atomic number is scandium

Their properties are in between those of s–block elements and p–block elements

The last electron enters into them in the d–orbital

answer is D.

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Detailed Solution

The electronic configuration of Lanthanum is $[Xe] 6 s^{2} 5 d^{1} .$ La is d-block element.

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