Answer
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Step 1:
Step 2:: To determine the number of valence electrons in magnesium (Mg), we must first identify its position in the periodic table.
Step 3:: Mg is located in group 2 (also known as the second column) of the periodic table.
Step 4:: The group number of an element corresponds to the number of valence electrons it has.
Final Answer
Therefore, magnesium has 2 valence electrons.
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