What is a Chalk crystalline or amporphous? and why?

Chalk is CaCO3 which is a crystalline in nature because it ionizes in water.

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In condensed matter physics, an amorphous (from the Greek a, without, morph�i> , shape, form) or non-crystalline solid is a solid that lacks the long-range order characteristic of a crystal.

In part of the older literature, the term has been used synonymously with glass . Nowadays, "amorphous solid" is considered to be the overarching concept, and "glass" the more special case: A glass is an amorphous solid that transforms into a liquid upon heating through the glass transition. [1]

Other types of amorphous solids include gels, thin films, and nanostructured materials

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Amorphous solids have irregular shape. They have only short-range order in the arrangement of constituent particles

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Amorphous forms of silicaCrystalline forms of silica
  • Irregular shape
  • Definite geometrical shape
  • Gradually soften over a range of temperature
  • Melt at a definite temperature
  • Irregular surfaces appear on cutting
  • Smooth surfaces appear on cutting
  • Short range order in arrangement of constituent particles
  • Long range order in arrangement of constituent particles

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chalks are crystalline in nature as smooth surfaces can be obtained in on cutting with a sharp edged tool.

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amorphous solids

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chalks are amorphous in nature as they dont have any regular structure. on cutting with sharp-edged tools rough surface is obtained.

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