June 07, 2020, 01:10:18 AM
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Topic: Allotrophy  (Read 113 times)

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Offline yalda

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Allotrophy
« on: May 06, 2020, 03:29:54 PM »
So what is the exact diffrence between allotrpe and isomer??
I read that allotrophy is beyween same elements but SiO2 have 2 allotrpes 

Offline mjc123

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Re: Allotrophy
« Reply #1 on: May 07, 2020, 11:05:58 AM »
Allotropy (no h) refers to different forms of the same element, e.g. graphite and diamond.
Polymorphism refers to different crystal structures of the same compound, e.g. SiO2.
Isomerism refers to different molecular structures of compounds with the same molecular formula, e.g. n-butane and 2-methylpropane (both C4H10).

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