(b)
according to modern measurements:
•
the radius of an atom is about 1 x 10-10 m
•
the radius of an atomic nucleus is about 1 x 10-14 m
show that these values fit with the nuclear model of the atom.

the product of the pressure and volume is also constant

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.