Which of the following salts is colourless?

The elements belonging to the first transition series have atomic numbers from

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.

Which of the following compounds is colored?

Which of the following represents the electronic configuration of a transition element?

$Zn$,$Cd$,and $Hg$ show the properties of