Which of the following has 1.54 A^o bond length throughout the crystal?

_________________ crystal consists of an assemblage of positive ions immersed in a sea of mobile electrons.

An example of metal excess defects  is

 ____________ defect arise when an ions occupies an interestitial position between the lattice points.

At what temperature does the carbon atom in diamond splits?

What is the C-C bond length in diamond?

The total number of atoms per unit cell in bcc is _______________

 ________________ solids  possess properties of incompressibility and rigidity to a certain extent but they do not have definite geometrical forms.

________________ is a good example of covalent crystal .