Chapter 9 Lesson 3 Metals and Non Metals

What is a nonmetal?

• A substance that is usually shiny and conducts heat well.

• A substance that is usually dull, brittle, and does not conduct heat or electricity well.

• A substance that is always a gas at room temperature.

• A substance that is malleable and ductile.

What is a metal?

• A shiny, malleable substance that conducts heat and electricity.

• A dull, brittle substance that does not conduct heat or electricity.

• A soft, flexible material that is used for insulation.

• A transparent material that is used in electronics.

What is the main characteristic of nonmetals?

• Nonmetals are good conductors of heat and electricity.

• Nonmetals are poor conductors of heat and electricity.

• Nonmetals are highly reactive with metals.

• Nonmetals have high melting and boiling points.

Metalloids _____________.

• are only found in nature as metals.

• have some properties of both metals and nonmetals.

• are exclusively nonmetals.

• are the most conductive elements.

Is a material that conducts electricity better than a nonmetal, but not as well as a metal.

• conductor

• insulator

• semiconductor

• superconductor

What are metalloids?

• Elements that are only metals.

• Elements that are only nonmetals.

• Elements that have properties of both metals and nonmetals.

• Elements that are radioactive.

What is an alloy?

• A pure metal with no other elements.

• A mixture of two or more metals.

• A type of metal that is not conductive.

• A metal that has been melted down.

Why are metals used in electrical wiring?

• They are lightweight and easy to handle.

• They have high conductivity.

• They are resistant to corrosion.

• They are inexpensive to produce.

What is malleability?

• The ability of a substance to be dissolved in water.

• The ability of a substance to be hammered or pressed into thin sheets.

• The ability of a substance to conduct electricity.

• The ability of a substance to change color when heated.

What is the main characteristic of metals?

• Metals are good conductors of heat and electricity.

• Metals are poor conductors of heat and electricity.

• Metals are brittle and break easily.

• Metals are transparent and allow light to pass through.