What are the different possible oxidation states exhibited by scandium $(Sc)$?

Among the following components of cement,which is present in the highest amount?

Four successive elements of the first transition series are given with their atomic numbers. Which one of them is expected to have the highest third ionization enthalpy?

An element is in $M^{3+}$ form. Its electronic configuration is $[Ar]3d^1$. The ion is:

$A$ substance contains an $M^{3+}$ ion with the electronic configuration $[Ar]3d^1$. The ion is........

Discuss the magnetic properties of transition elements.