Magnesium has 12 electrons arranged in three energy levels. the outer level has two electrons. in order to become stable, the atom loses two electrons thus exposing the previous level with 8 electrons and subsequently becomes an ion witha. 2 positive chargesb. 8 negative chargesc. 1 negative charged. 8 positive chargese. no charge

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.