What is the number of electrons in Mg atom and Mg2+ ion?
Question
What is the number of electrons in Mg atom and Mg2+ ion?
Solution
The number of electrons in a neutral atom is equal to the number of protons. Magnesium (Mg) has 12 protons, so a neutral Mg atom also has 12 electrons.
When Mg loses two electrons to become Mg2+, the number of electrons becomes 12 - 2 = 10. So, Mg2+ ion has 10 electrons.
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