Which of the following is the heaviest metal?

Assertion: Cuprous ion $(Cu^{+})$ has unpaired electrons while cupric ion $(Cu^{2+})$ does not.
Reason: Cuprous ion $(Cu^{+})$ is colourless whereas cupric ion $(Cu^{2+})$ is blue in the aqueous solution.

Which of the following statements is incorrect?

The common positive oxidation states for an element with atomic number $24$ are:

The general electronic configuration of the transition elements is

Besides $Zn$ and $Cu$,german silver contains the metal