Allotropy refers to the ability of a material to exist in two or more different physical forms.

Allotropy refers to the ability of a material to exist in two or more different physical forms.

• A. True
• B. False
• C. Only occurs in metals
• D. Polymorphism

Answer: (A)

Allotropy is the phenomenon where an element can exist in more than one structural form in the same state. This means different arrangements of atoms or different crystal structures, which lead to distinct properties. For example, carbon can be found as diamond, graphite, and other forms; phosphorus has white and red allotropes; sulfur also has multiple forms. Because the statement describes an element having two or more physical forms, it accurately defines allotropy, so the statement is true. It’s not limited to metals—the concept occurs in nonmetals as well, as shown by the carbon and sulfur examples. Polymorphism is the broader idea that any substance (including compounds) can have multiple crystal structures; allotropy is the elemental, more specific case of that phenomenon.

Allotropy is the phenomenon where an element can exist in more than one structural form in the same state. This means different arrangements of atoms or different crystal structures, which lead to distinct properties. For example, carbon can be found as diamond, graphite, and other forms; phosphorus has white and red allotropes; sulfur also has multiple forms. Because the statement describes an element having two or more physical forms, it accurately defines allotropy, so the statement is true.

It’s not limited to metals—the concept occurs in nonmetals as well, as shown by the carbon and sulfur examples. Polymorphism is the broader idea that any substance (including compounds) can have multiple crystal structures; allotropy is the elemental, more specific case of that phenomenon.