Consider this reaction: 2so2 (g) + o2 (g) 2so3 (g) + heat. what will happen if more oxygen gas is added to the reaction mixture?

Addition  of  more oxygen gas  in  the  reaction  mixture  will  led the  equilibrium   shift toward  the product  side.The  equilibrium  shift  is  influenced  by  the  change  in  concentration  of  the  molecules  involved  in  the  reaction.  Adding  more  oxygen  led  to  addition  of  reactant  concentration thus  equilibrium  shift  to  product  side

Ithink 2 is the correct

Both models are effective because they show the valence electrons, and these valence electrons indicate the reactivity of an element.