Solution:- methane molecule has one carbon and four hydrogen atoms, carbon has 4 valence electrons and hydrogen has 1 valence electrons. So, total valence electrons for methane = 4+4(1) = 8
Carbon is the central atom and the four H atoms are bonded to it via single bonds. C uses all it's four valence electrons in bonding. Since total eight electrons are in bonding, the octet of carbon is complete and hence there are no lone pairs.
The lewis structure of methane is shown below:
