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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 forms of an element with different physical and chemical properties. This white tin has a melting point of 232Â°C (450Â°F), a boiling point of 2,260Â°C (4,100Â°F), and a density of 7.31 grams per cubic centimeter.