Which of the following statement is wrong?

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Among the following elements: K, Mn, Cd, Cs, Fe, Cu, Pb, Os, YThe number of transition element is 4.

All the lanthanides and actionides belong to III B or the 3rd group in the Periodic table

The inner transition elements belong to the f' block of the periodic table and are shown separately at the bottom of the periodic table.

The d-block elements have variable valency.

answer is A.

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Detailed Solution

Statement (1) is wrong. The number of transition elements is five (Mn, Fe, Cu, Os, Y).

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