The reactivity of transition metals changes a lot on the periodic table.

1. General Trend:

   • Transition metals are usually not as reactive as alkali metals.
   • But they are more reactive than non-metals.

2. Reactivity Down a Group:

   • As you go down the periodic table in the transition metals, they often become more reactive.
   • For example:
     • Scandium (Sc) does not react with acids as much as Titanium (Ti) does.
     • Iron (Fe) reacts more easily than Nickel (Ni).

3. Oxidation States:

   • Many transition metals can have different oxidation states, which makes them more reactive.
   • For example, Manganese (Mn) can have oxidation states ranging from +2 to +7.

4. Metallic Character:

   • Transition metals become more "metal-like" as you go down the group.
   • This increase in metallic character leads to greater reactivity.

These points show how the reactivity of transition metals varies based on where they are on the periodic table.