Which solid at room temperature has a color described as black?

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Multiple Choice

Which solid at room temperature has a color described as black?

Explanation:
Halogens change their appearance and state as you move down the group. At room temperature, fluorine and chlorine are gases, bromine is a liquid, and both iodine and astatine are solids. Among those solids, astatine is described as black, whereas iodine is a very dark solid often described as purple-black or gray-black. So the solid at room temperature that is described as black is astatine.

Halogens change their appearance and state as you move down the group. At room temperature, fluorine and chlorine are gases, bromine is a liquid, and both iodine and astatine are solids. Among those solids, astatine is described as black, whereas iodine is a very dark solid often described as purple-black or gray-black. So the solid at room temperature that is described as black is astatine.

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