Why there is early and late transitional metals? what the difference between the two?

Question

Why there is early and late transitional metals? what the difference between the two?

Answer 1

The early vs. late transition metals differ in their oxidation states (each metal has different possible oxidation states).  Electrons have a stronger attraction to the protons in the late transition metals, so the later transition metals form bonds that are harder to break. You can read more about transition metal properties from the links below.