Final answer:
Metalloids display properties between those of metals and nonmetals and are often semiconductors, while transition metals have incompletely filled d orbitals, are good conductors, and can form colored compounds with various oxidation states.
Step-by-step explanation:
Difference Between Metalloids and Transition Metals
The primary difference between metalloids and transition metals lies in their respective positions on the periodic table and their physical and chemical properties. Metalloids, or semi-metals, are elements that exhibit properties intermediate between those of metals and nonmetals. They are found adjacent to the zigzag, or staircase, line on the periodic table and are known for being semiconductors. Common metalloids include silicon and germanium. In contrast, transition metals are located in Groups 3 through 12 of the periodic table and are known for forming ions with incompletely filled d orbitals. Examples of transition metals include copper and iron. These metals are typically very good conductors of electricity and heat, and they are malleable and ductile. Furthermore, unlike metalloids, transition metals often display various oxidation states and form colored compounds.