Explain
(i) The basis of similarities and differences between metallic and ionic crystals.
(ii) Ionic solids are hard and brittle.
Define the term ‘amorphous’. Give a few examples of amorphous solids.
What makes a glass different from a solid such as quartz? Under what conditions could quartz be converted into glass?
Solid A is a very hard electrical insulator in solid as well as in molten state and melts at extremely high temperature. What type of solid is it?
Why is glass considered a super cooled liquid?