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1 Allotropes are forms of the same element which exhibit different physical properties. 2  Elements such as carbon, oxygen, phosphorus, tin and sulfur, display allotropy.
Allotropy or allotropism (from Greek á¼Î»Î»Î¿Ï (allos) , meaning other, and ÏÏÏÏÎ¿Ï (tropos) , meaning manner, form) is the property of some chemical elements to exist in two or more different forms, in the same physical state, known as allotropes of these elements.llotropes are different structural forms of the same element and can exhibit quite different physical properties and chemical behaviours. The change between allotropic forms is triggered by the same forces that affect other structures, i.e. pressure, light, and temperature.