The force that binds a metal ion to a number of electrons within its sphere of influence is known as
Covalent bond
Ionic bond
Coordinate bond
Metallic bond
At what temperature does the carbon atom in diamond splits?
40oC
4000oC
400oC
40000oC
Graphite is a covalent network crystal but what is its exceptional property?
High melting point
low volatile
bad conduction
good conduction
________________ is a good example of covalent crystal .
Diamond
Ice
Graphite
Charcoal
Diamond is a _______ crystal.
opaque
transparent
translucent
none of the above
The total number of atoms per unit cell in bcc is _______________
1
2
3
4
Which unit cell have diamond cell?
triclinic
trigonal
octahedral
tetrahedral
How many carbon atoms surrounded each carbon atom in diamond structure?
8
6
The conductivity due to the positive holes are called
Superconductors
n-type semiconductor
p - type semiconductors
Conductors
Which of the following has its atoms connected by valence bonds?
sodium chloride
diamond
graphite
