7. An alloy is a solid combination of atoms of two or more metals.
8. Two alloys we use regularly are steel and gold. Steel is composed of iron and carbon, and it us used to make kitchen utensils, plumbing fixtures, and architectural designs. 14-carat gold is made of gold, copper, and silver to make jewelry.
9. Carbon is a nonmetal component made up of steel and stainless steel.
10. Chromium-platinum is an alloy and a well-defined compound. It is used to compose some razor blade edges because it is very hard.
11. Elements that behave as semi-conductors are metalloids. They are located at the break of metals and nonmetals. They have the qualities of metals and nonmetals. Metals are conductive and nonmetals are not conductive
12. Phosphorus, arsenic, and aluminum.
13. The primary use is for computers to process digital information. Semiconductor are transistors and integrated circuits (parts of electronics).
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