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What is the most common ionic charge of chlorine (Cl) when it forms an ion?
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2. Atoms & Elements
Periodic Table: Charges
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What is the charge on a magnesium ion (Mg)?
A
2+
B
3+
C
1+
D
1-
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Recall that magnesium (Mg) is an element in Group 2 of the periodic table, also known as the alkaline earth metals.
Elements in Group 2 typically lose two electrons to achieve a stable electron configuration similar to the nearest noble gas.
When magnesium loses two electrons, it forms a cation with a charge of +2, written as \(\mathrm{Mg}^{2+}\).
The charge on the magnesium ion corresponds to the number of electrons lost, which is 2 in this case.
Therefore, the charge on a magnesium ion is \$2+$.
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