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Reading an Element From Two Ion Ratios 4 questions
Reading an Element From Two Ion Ratios
Base your answers on the information provided and your knowledge of chemistry. Use the 2025 Chemistry Reference Tables as needed.
A mineral exhibit makes two pure ionic model solids with the same unknown metal M. Each compound contains only metal ions and the one anion listed. Chloride has charge −1. Oxide has charge −2. In this model M has the same charge in both solids.
| Solid | Metal ion count | Anion ion count | Anion |
|---|---|---|---|
| P | 6 | 12 | Chloride |
| Q | 6 | 6 | Oxide |
Question 1
Infer the metal ion charge from P and confirm it independently using Q.
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A label lists three possible metals. In the exhibit, sodium from Group 1 forms Na+, magnesium from Group 2 forms Mg2+, and aluminum from Group 13 forms Al3+.
Question 2
Which listed group matches both solids?
- Group 1 only
- Group 2 only
- Group 13 only
- All three groups
Question 3
A student says the one-to-one ratio in Q establishes that M has a +1 charge. Use the oxide record to evaluate the claim.
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Question 4
The exhibit makes a third solid of M ions and nitride ions with charge −3. Find the smallest whole-number metal-to-nitride ratio and explain.
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