Question

A student 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.

Answer 1

answer B

Mg has a positive ionic charge because it hoped to loose its two electrons to make it stable or happy

O had a negative ionic charge bc it wants to gain electrons to make it stable or happy

therefore,

QA) O would not want/wouldn't use up the energy to transfer 6 of its electrons and Mg would accept O's electrons
Q3) goes against laws of chemistry
Q4) Mg can not gain 2 extra electrons unless it is a double molecule (which it is not) a

Answer 2

Both electrons of Mg should be transferred to one O.

Step-by-step explanation:

This is because metals like to lose electrons whereas non metals like to gain electrons in an ionic compound. MgO is an ionic compounds. So Magnesium being a metal in group 2 of periodic table, it wants to donate 2 electrons to get to the octet rule, so it donates its electrons and oxygen accepts them to fill its octet rule.