Chemistry, asked by shurti2003, 11 months ago

Why the second and third members in each group of the transition elements have very similar properties?

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Answered by diya5746

Answer:

From this point through element 71, added electrons enter the 4f subshell, giving rise to the 14 elements known as the lanthanides. ... Because of the lanthanide contraction, the second- and third-row transition metals are very similar in size.

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