Allotrope
Allotrope
Allotrope (pronunciation: /ˈæləˌtroʊp/) is a term used in Chemistry to describe different forms of a Chemical element that exist in the same Physical state but have different structures and properties. The term is derived from the Greek words 'allos', meaning 'other', and 'tropos', meaning 'manner' or 'way'.
Etymology
The term 'allotrope' was first used in the mid-19th century and is derived from the Greek words 'allos' (meaning 'other') and 'tropos' (meaning 'manner' or 'way'). It was coined to describe the phenomenon where a single chemical element can exist in two or more different forms.
Examples
Some common examples of allotropes include Carbon, which can exist as Graphite, Diamond, and fullerenes; Oxygen, which can exist as dioxygen (O2) and trioxygen (O3); and Phosphorus, which can exist in white, red, and black forms.
Related Terms
- Isotope: Isotopes are variants of a particular chemical element which differ in neutron number, and consequently in nucleon number. All isotopes of a given element have the same number of protons but different numbers of neutrons in each atom.
- Polymorph: Polymorphs are materials that have the same chemical composition but different crystal structures.
- Phase: In the physical sciences, a phase is a region of space (a thermodynamic system), throughout which all physical properties of a material are essentially uniform.
External links
- Medical encyclopedia article on Allotrope
- Wikipedia's article - Allotrope
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