Due to covalent bonding,the transition metals are

The oxide that shows magnetic property is:

Which of the following paramagnetic ions has a magnetic moment (spin-only) of the order of $5 \ BM$? $(Mn = 25, Cr = 24, V = 23, Ti = 22)$

Which element from the following exhibits a common oxidation state of $+2$ only?

Which electrons are involved in achieving higher oxidation states by transition metals?

The magnetic moment of $M^{x+}$ (atomic number $= 25$) is $\sqrt{15} \ BM$. The number of unpaired electrons and the value of $x$,respectively,are