(a) The atomic number of carbon is 6.
Its electronic configuration is K L.
2 4
(b) Carbon always forms covalent bonds. This is because it is tetravalent and attain the inert gas configuration of 8 electrons in its outermost shell by sharing electrons.
(c) The three allotropic forms of carbon are:
(i) Diamond
(ii) Graphite
(iii) Buckminsterfullerene