The conductivity of transition elements is very high. Silver metal is the best conductor.

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Detailed Solution

The conductivity is high only if there is easy movement of electrons in any conductor then this type of material is called a good conductor.
As in the case of transition metals, the outermost electrons are not strongly attracted to the nucleus of an atom, due to which when an electric voltage is applied the outermost electron loses its force of attraction towards the nucleus and makes the transition from one energy level to another.
Silver is the best conductor, the answer is that its electrons are free to move than those of the other elements. This has to do with its valence and crystal structure.
Most metals conduct electricity. Other elements with high electrical conductivity, are aluminium, zinc, nickel, iron, and platinum.

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