Here's why:
* Compound: A substance formed when two or more different elements are chemically bonded together.
* Allotrope: Different structural forms of the same element.
Examples of allotropes:
* Carbon: Diamond, graphite, fullerene, and amorphous carbon are all allotropes of carbon. They have the same chemical composition (pure carbon) but different arrangements of carbon atoms, leading to different properties.
* Oxygen: Oxygen gas (O2) and ozone (O3) are allotropes of oxygen.
Key Takeaway: While allotropes are made of the same element, their different structures give them unique physical and chemical properties.