A) diamond
B) graphite
C) sodium
D) potassium.
Correct Answer: A
Solution :
Potassium and Sodium are metals so have mobile electrons. In graphite, each of the C-atom is covalently bonded to three other C-atoms so one valence electron is available for electrical and thermal conduction there is no mobile electron present in diamond as each C-atom is bonded to four other C-atoms by covalent bond.
You need to login to perform this action.
You will be redirected in
3 sec
