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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.
Allotropes are different forms of the same element. Different bonding arrangements between atoms result in different structures with different chemical and physical properties. Allotropes occur only with certain elements, in Groups 13 through 16 in the Periodic Table.here are only three allotropic elements in Group 16, oxygen, sulfur, and selenium. Only two oxygen allotropes are knownâdinuclear oxygen (dioxygen, O 2) and trinuclear ozone (O 3) (Figure 6). Both are gases at room temperature and pressure.