The expression "Mg → Mg2+ + 2e-" represents the oxidation of a magnesium atom (Mg) where it loses two electrons (2e-) to form a magnesium ion (Mg2+).Mg: Mg represents a single atom ofmagnesium. Magnesium is an element with atomic number 12, and its neutral form has 12 protons and 12 electrons.- →: The arrow in the expression indicates a chemical reaction or a change in the state of the species involved. In this case, it represents the oxidation of the magnesium atom.- Mg2+: Mg2+ represents a magnesium ion. When the magnesium atom loses two electrons, it becomes positively charged because it now has more protons (12) thanelectrons(10). The "+2" superscript indicates the 2+ charge on the magnesium ion.- 2e-: The "2e-" represents two electrons. In the reaction, the magnesium atom loses two electrons, and these electrons are shown as 2e- to indicate their transfer from the magnesium atom.So, when we put it all together, "Mg → Mg2+ + 2e-" represents the process ofoxidationin which a magnesium atom loses two electrons to form a magnesium ion with a 2+ charge. This reaction occurs when magnesium undergoes a chemical or electrochemical reaction, leading to the formation of magnesium ions with a higher positive charge.To know more aboutmagnesiumrefer herebrainly.com/question/8351050##SPJ11...

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