Chapter 17: Elements and Their Properties

Three transition elements in Group 12 of the periodic table are _____.

• iron, nickel, and cobalt

• mercury, zinc, and cadmium

• copper, silver, and gold

• neon, helium, and xenon

The process by which a solid changes directly to a gas without first becoming a liquid is called __.

• condensation

• ionization

• sublimation

• evaporation

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In the gaseous state _____ form diatomic covalent molecules.

• noble gasses

• alkali metals

• alkaline earth metals

• halogens

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Different forms of the same element that have different properties because of different atom arrangements are called __________.

• allotropes

• carbons

• silicons

• graphites

At room temperature, most metals are _____.

• liquids

• solids

• radioactive

• gases

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An allotrope of carbon that is hard and is often used in jewelry is _____.

• silver

• diamond

• quartz

• graphite

Metals can be used as wire because they are _____.

• ductile

• malleable

• shiny

• alloys

The _____ often occur in nature as uncombined elements.

• alkaline earth metals

• alkali metals

• actinide series

• transition elements

Substances that conduct an electric current only under certain conditions are most likely to be ______.

• metals

• nonmetals

• metalloids

• noble gases

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The elements in Groups 3 through 12 of the periodic table are the ______.

• actinides

• lanthanides

• transition elements

• noble gases