Describe what subatomic particle is involved in light emission.

Photons

Explanation: These are packet of light. These subatomic particles have no electrical charge and rest mass. Photons are also considered as field particles in which they are to be carriers of electromagnetic fields.

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.