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3 sie 2020 · Get the allotrope definition in chemistry. See examples of allotropes of different elements, including those of carbon and oxygen.
For some elements, allotropes have different molecular formulae or different crystalline structures, as well as a difference in physical phase; for example, two allotropes of oxygen (dioxygen, O 2, and ozone, O 3) can both exist in the solid, liquid and gaseous states.
Elements exhibiting allotropy include tin, carbon, sulfur, phosphorus, and oxygen. Tin and sulfur are enantiotropic. The former exists in a gray form, stable below 13.2 °C, and a white form, stable at higher temperatures.
Key Concepts. Allotropes are forms of the same element which exhibit different physical properties. Elements such as carbon, oxygen, phosphorus, tin and sulfur, display the property known as allotropy.
Allotropes of Carbon. Allotropes are different molecular or crystalline forms of the same element, resulting in different physical properties. Table of Contents. Carbon is an example of an element that exists as different allotropes. Each carbon atom has an outermost electron shell with 4 electrons.
As an element, carbon's ability to form strong multiple bonds enables it to form many allotropes, while the remaining elements in this group are network covalent or metallic solids. Selected properties of the Group 14 elements are given in Table \(\sf{\PageIndex{1}}\).
16 sty 2023 · 14.4: Allotropes of Carbon. Page ID. Carbon is capable of forming many allotropes in addition to the well known diamond and graphite forms. The physical properties of carbon vary widely with the allotropic form. For example, diamond is highly transparent, but graphite is opaque and black.
