Identify the outer electronic configuration of the $first$ element of the $first$ transition series.

What is the value of the spin-only magnetic moment of $Ni$ $(Z=28)$ in the $+2$ oxidation state (in $BM$)?

Identify the components of the alloy known as German Silver.

The lanthanide contraction is responsible for the fact that

Which of the following pairs of ions are colored in their aqueous solution?

Consider $|x|$ as the difference in oxidation states of Mn in the highest manganese fluoride and the highest manganese oxide. The ions with $|x|$ number of unpaired electrons from the following are: $A$. $Sc^{3+}$ $B$. $Zn^{2+}$ $C$. $V^{2+}$ $D$. $Fe^{2+}$ $E$. $Co^{2+}$ Choose the correct answer from the options given below: