A symbol of magnesium, Mg, with two dots representing two free electrons. The correct option is D.
Electron dot diagram
Magnesium is represented by Mg.
Magnesium has an atomic number of 12. Thus the electron configuration will be 2,8,2.
This means that there are two valence electrons in every Mg atom.
Therefore, the electron do diagram would be the symbol of the element with two dots representing the two valence electrons.
More on electron dot diagrams can be found here: https://brainly.com/question/2115636
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