Which of the following elements is a solid at room temperature?
A) chlorine
B) helium
C) mercury
D) oxygen
E) barium

Name: Which of the following elements is a solid at room temperature? A) chlorine B) helium C) mercury D) oxygen E) barium
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Question

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Barium is an alkaline earth metal that is a solid at room temperature. Chlorine and oxygen are gases, helium is a noble gas that is also a gas at room temperature, and mercury is a liquid at room temperature.

Which of the Following Elements Is a Solid at Room