Silicon

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Silicon, SIHL uh kuhn, is a hard, dark gray element with a metallic luster. Silicon is a semiconductor, a material that conducts electric current better than an insulator like glass, but not as well as a conductor like copper.

Boron

Boron, BAWR ahn, is an extremely hard, nonmetallic element. It is quite evenly distributed in small amounts throughout Earth's surface. The chief… See more »

Sulfur

Sulfur is a yellow, nonmetallic chemical element that is found in many parts of the world. It has been used for hundreds of years. The ancient… See more »

Bromine

Bromine, BROH meen or BROH mihn, is a reddish liquid chemical element. Bromine is highly reactive, and it readily vaporizes into a reddish-brown… See more »

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Silicon

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