For each ionic compound formula, identify the main group to which X belongs: (b) Al _2 X _3

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23-08-2022
Chemistry

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For each ionic compound formula, identify the main group to which X belongs: (b) Al _2 X _3

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rafikiedu08 rafikiedu08 · Answer 1 · 2022-08-30T06:41:53+02:00

For each ionic compound formula, identify the main group to which X belongs group 16.

Al_2X_3. Al is in group III A, and exists in salts as a (3+) ion. Since we have 2, it accounts for 6+. This is balanced by 3 X, so X must be a (-2) ion. We can observe that X belongs to group 16 (or VIA) by moving two columns to the left of the noble gases, which also include O, S,... etc

What are noble gases?

Noble gases are any of the seven chemical elements that make up Group 18 (VIIIa) of the periodic chart. Helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), radon (Rn), and oganesson are the constituent elements (Og). Noble gases are inflammable, colorless, odorless, and tasteless substances.

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