![]() Hence, magnesium has 2 valence electrons. Here, you can see that the highest principal quantum number is 3, and the total electrons in this principal quantum number is 2. The electron configuration of magnesium is 1s 2 2s 2 2p 6 3s 2. Valence electrons can also be determined as the electrons present in the shell with highest principal quantum number (n). You can effortlessly find every single detail about the elements from this single Interactive Periodic table.The magnesium element has 2 electrons in outermost orbit. Let me tell you how this Interactive Periodic Table will help you in your studies.ġ). Free Gift for you: Interactive Periodic Table
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