The number of valence electrons in a graphite atom is :
(a) 2
(b) 4
(c) 3
(d) 5
Graphite is a good conductor of electicity due to the presence of ............
(a) lone pair of electrons (b) free valence electrons
(c) cations (d) anions
(a) What are valence electrons? Where are valence electrons situated in an atom ?
(b) What is the number of valence electrons in the atoms of an element having atomic number 13 ? Name the valence shell of this atom.