Answer
Please see the work below.
Work Step by Step
Transition elements are the elements of group 3 to 12 having outer electronic configuration $(n-1) d^{1-10} ns^{1-2}$. There are four transition series, which are 3d, 4d, 5d, and 6d.
General Characteristics
• They form both ionic and covalent compounds.
• They are hard, malleable, and ductile metals (except mercury which is a liquid) with high melting and boiling points.
• Their ionization enthalpies lie between s-block and p-block elements.
• They form colored complexes.
Lanthanides are characterized by the filling of 4 f-orbitals are the elements the following lanthanum from Ce to Lu.
Actinides are characterized by the filling of 5f-orbitals and are the elements of the following actinium from Th to Lr. Their characteristic outer electronic configuration is
$(n-2)f^{1-14} (n-1) d^{0-1} ns^{2}$.
General Characteristics
• They are heavy metals.
• They have generally high melting and boiling points.
• Their compounds are generally colored.
