Which group of elements is known as coinage metals?

Write a brief note on the electronic configurations of the transition elements.

An element having the electronic configuration $[Ar]3d^24s^2$ belongs to

An atom with atomic number $21$ belongs to the category of

Among the following,the incorrect statement about transition metals is:

Which of the following statements are correct? $(1)$ Manganese can exhibit a $+7$ oxidation state. $(2)$ Zinc forms colored ions. $(3)$ $[CoF_6]^{3-}$ is diamagnetic. $(4)$ $Sc$ can exhibit a $+4$ oxidation state. $(5)$ $Zn$ exhibits only a $+2$ oxidation state.