p204 #7-13
7. Alloy is a new made substance physically combined by different metals.
8. Steel, this is made from iron, and carbon. Brass, this is made from zinc and copper.
9. Carbon
10. Steel, which is used mainly in kitchen wear and cooking supplies, is 99% and 1% carbon does not rust.
11. Metalliods are semiconductors because they are in between metals and nonmetals. The can barely conduct electricty and be malleable .
12. Gallium, Arsenic, sillicon
13. Doping technology is so that we can make less reactive elements more reactive.
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