Multiple Choice
Which of the following correctly represents the charge and symbol for an oxide ion?
2. Atoms & Elements
Ions
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What is the charge of the magnesium ion (Mg^{2+})?
A
2-
B
0
C
2+
D
1+
Verified step by step guidance1
Identify the element in question, which is magnesium (Mg). Magnesium is an alkaline earth metal found in Group 2 of the periodic table.
Recall that elements in Group 2 typically lose two electrons to achieve a stable electron configuration, forming ions with a +2 charge.
Understand that when magnesium loses two electrons, it forms a cation with a charge of 2+, denoted as Mg^{2+}.
Recognize that the charge of the ion corresponds to the number of electrons lost or gained compared to the neutral atom; losing electrons results in a positive charge.
Therefore, the charge of the magnesium ion is 2+, which matches the notation Mg^{2+}.
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