Multiple Choice
Which one of the following elements will most readily form an ion with a 1- charge in an ionic compound?
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2. Atoms & Elements
Ions
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Aluminum is a Group 3A metal. Which ion does Al typically form?
A
Al^{2+}
B
Al^{3+}
C
Al^{+}
D
Al^{4+}
Verified step by step guidance1
Identify the group number of aluminum in the periodic table. Aluminum is in Group 3A (or Group 13 in IUPAC numbering), which means it has 3 valence electrons.
Understand that metals tend to lose electrons to achieve a stable electron configuration, often resembling the nearest noble gas.
Since aluminum has 3 valence electrons, it typically loses all three to form a cation with a +3 charge.
Write the ion formed by aluminum as $Al^{3+}$, indicating it has lost three electrons.
Recognize that ions like $Al^{2+}$, $Al^{+}$, or $Al^{4+}$ are not common or stable for aluminum under normal conditions.
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