Astudent made the lewis dot diagram of a compound as shown.

mg is written with two dots shown on its top. an o is written on each side of mg. each o has six dots around it. an arrow is shown from one dot on mg toward the vacant space around the o on the right. another arrow is shown from the other dot on mg toward the vacant space around the o on the left. the title of the art is students lewis dot model.

what is the error in the lewis dot diagram?

an o atom should transfer all its six electrons to mg because the formula is mgo.
both electrons of mg should be transferred to one o atom because the formula is mgo.
the electrons should be transferred from each o atom to mg because mg has fewer electrons.
the number of dots around mg should be four because it has to transfer two electrons to each o.