Problem: Little is known about the properties of astatine, At, because of its rarity and high radioactivity. Nevertheless, it is possible for us to make many predictions about its properties.Would you expect At to be a metal, nonmetal, or metalloid?

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Recall that the trend for metallic character is as follows: it decreases from left to right and increases down a period in the periodic table. 


The given element is:


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Problem Details

Little is known about the properties of astatine, At, because of its rarity and high radioactivity. Nevertheless, it is possible for us to make many predictions about its properties.

Would you expect At to be a metal, nonmetal, or metalloid?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Periodic Trend: Metallic Character concept. You can view video lessons to learn Periodic Trend: Metallic Character. Or if you need more Periodic Trend: Metallic Character practice, you can also practice Periodic Trend: Metallic Character practice problems.

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Based on our data, we think this problem is relevant for Professor Keister's class at UB.