Pottassium dichromate is an example of _____crystal system.

a ≠ b≠ c and α≠β≠δ≠90⁰ is the criteria for a crystal system

 Which of the following is a non conductor of electricity? 

The co-ordination number of face centered cubic unit cell is

Covalent network crystals are often referred as

 __________________of metals decreases at high temperatures.

Even though amorphous solids lack any long range order like crystalline solids, they may have small regions of systematic arrangements. Such regions in amorphous solids are known as

 What does the metallic crystals contains in the interstices between the crystal lattice?

_________ is a common amorphous solid

Crystalline solids exhibit