What is the number of unpaired electrons in $Ti$ in $+3$ state?

Which ion has the maximum magnetic moment?

Identify the correct decreasing order of atomic size from the following.

Explain $d$-block elements of the periodic table.

In transition elements,the orbitals that are partially filled by electrons are:

Fill in the blanks:
$(a)$ The shielding effect of $d$-electrons is ......... effective than $p$-electrons.
$(b)$ $A$ decrease in exchange energy leads to a ......... in stability.
$(c)$ The maximum oxidation state of $Mn$ is ..........
$(d)$ The stability of $Mo(VI)$ and $W(VI)$ is found to be .......... than that of $Cr(VI)$.