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17-11-2021
Chemistry

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What is the formula for this ionic crystal?

What is the formula for this ionic crystal class=

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17-11-2021

Answer:

Al₄O₅

Explanation:

The key at the bottom tells us the blue spheres are oxygen atoms and the red spheres are aluminum atoms. By counting, there are 4 aluminum atoms and 5 oxygen atoms. Therefore, the formula is Al₄O₅.

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