Which statement is true of a chemical change?
OA.
It involves changes in the molecular structure.
OB.
It involves changes in phase but not changes in the molecular structure.
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C.
It involves dissolving one substance into another.
OD.
It involves a change in the state, or phase, of a substance.
E.
It involves the process of separating two or more dissolved substances.

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.