Electronic Configuration of the Transition Elements

Match the following:

$\begin{array}{cccc}\left(\mathrm{a}\right)& {\mathrm{Cr}}^{3+}& \left(\mathrm{i}\right)& \left[\mathrm{Ar}\right]3{\mathrm{d}}^{10}\\ \left(\mathrm{b}\right)& {\mathrm{Cu}}^{+}& \left(\mathrm{ii}\right)& \left[\mathrm{Xe}\right]4{\mathrm{f}}^4\\ \left(\mathrm{c}\right)& {\mathrm{Co}}^{2+}& \left(\mathrm{iii}\right)& \left[\mathrm{Ar}\right]3{\mathrm{d}}^5\\ \left(\mathrm{d}\right)& {\mathrm{Mn}}^{2+}& \left(\mathrm{iv}\right)& \left[\mathrm{Ar}\right]3{\mathrm{d}}^7\\ \left(\mathrm{e}\right)& {\mathrm{Pm}}^{3+}& \left(\mathrm{v}\right)& \left[\mathrm{Ar}\right]3{\mathrm{d}}^3\end{array}$

Transition metal elements exhibit general electronic configuration________

Which of the following $3\mathrm{d}$ series elements having correct electronic configuration:

The correct statements(s) about ${\mathrm{Cr}}^{2+}$and ${\mathrm{Mn}}^{3+}$ is (are)

Which of the following ions have the same numbers of unpaired electrons?

From the following, the correct statement is/are?
a. Oxidation potential $\left(\mathrm{M}/{\mathrm{M}}^{2+}\right)$ of $\mathrm{Cu}$ is least in $3\mathrm{d}$ series.
b. ${\mathrm{Fe}}^{3+}$ is more stable than ${\mathrm{Mn}}^{3+}$ in aqeous solution.
c. Exchange energy is more in case of ${\mathrm{Fe}}^{3+}$ than ${\mathrm{Mn}}^{3+}$.
d. First IE of Mn is more than that of Fe.

The group of the element in periodic table having electronic configuration  $\left[\mathrm{A}\mathrm{r}\right]3{\mathrm{d}}^6\mathrm{ }4{\mathrm{s}}^2$ is-

Which of the following compounds is colored and paramagnetic?

The number of unpaired electrons in ${\left[{\mathrm{CoF}}_6\right]}^{3-}$ is _________.

${}^{\text{'}}\mathrm{X}^{\text{'}}$ and ${}^{\text{'}}\mathrm{Y}^{\text{'}}$ are d-block elements placed in group 12 of the modern periodic table. ${}^{\text{'}}X^{\text{'}}$ is in period 4 and ${}^{\text{'}}\mathrm{Y}^{\text{'}}$ is in period $5 .$ How many elements are placed between ' X ' and 'Y' in the modern periodic table?

How many of the following has 4 unpaired electrons? ${\mathrm{Cr}}^{2+},{\mathrm{Co}}^{3+},{\mathrm{Cu}}^{2+},{\mathrm{Ni}}^{2+}$

The electronic configuration of transition element ${}^{\text{'}}\mathrm{X}^{\text{'}}$ is $\left[\mathrm{Ar}\right]3{\mathrm{d}}^5$ in its +3 oxidation state. What is its atomic number?

How many unpaired electrons are present in a ${\mathrm{Fe}}^{2+}$ ion?

What is the electronic configuration of $\mathrm{Gd}\left(64\right)$?

The incorrect arrangement regarding the properties of the given species is:

Which of the following ionic species contains the maximum number of unpaired electrons? 

Among the following, in which species $(\mathrm{n}-1){\mathrm{d}}_{{\mathrm{x}}^2-{\mathrm{y}}^2}$ orbital took part in hybridization?

Choose the incorrect statement.

The coloured compound among the following is:

Among the following series of transition metal ions, how many metal ions have ${\mathrm{d}}^{\mathrm{2}}$ electronic configuration:

$\mathrm{F}{\mathrm{e}}^{4+},{\mathrm{V}}^{3+},\mathrm{S}{\mathrm{n}}^{2+},\mathrm{A}{\mathrm{u}}^{3+}, \mathrm{T}{\mathrm{i}}^{2+},\mathrm{A}{\mathrm{s}}^{3+},\mathrm{C}{\mathrm{r}}^{3+},\mathrm{M}{\mathrm{n}}^{5+}, \mathrm{C}{\mathrm{o}}^{3+},\mathrm{Z}{\mathrm{r}}^{2+},\mathrm{C}{\mathrm{d}}^{2+},\mathrm{M}{\mathrm{o}}^{4+},\mathrm{L}{\mathrm{a}}^{2+},\mathrm{T}{\mathrm{a}}^{4+},\mathrm{C}{\mathrm{o}}^{6+},\mathrm{N}{\mathrm{i}}^{4+}$