The number of nearest neighbors of an atom in a crystal lattice is called the
Rank of the unit cell
Crystal co-ordination number
Order of the unit cell
Dimensional number
Covalent network crystals have low
viscosity
volatility
melting point
boiling point
Pottassium dichromate is an example of _____crystal system.
monoclinic
triclinic
hexagonal
rhombohedral
__________ has more open structure than diamond.
silicon carlide
sodium chloride
metal
graphite
In ________ there is a structural particles at the center of each face in addition to a structural particle at each corner of the unit cell.
Primitive
Face centered
Body centered
End centered
Covalent network crystals are often referred as
Ionic crystals
Molecular crystals
Atomic crystals
Metallic crystals
The co-ordination number of face centered cubic unit cell is
8
10
12
14
What is the C-C bond length in diamond?
1.31 Ao
2.6 Ao
1.54 Ao
0.86 Ao
Crystals belong to __________ type have their lattice points occupied by independent covalent molecules.
Covalent network crystals
Covalent molecular crystals
The co-ordination number of simple cubic unit cell is
2
4
6