Unit 3 Lesson 2 Practice

An element with atomic number \(13\) (Aluminum) is classified as:

• Metalloid
• Noble Gas
• Metal
• Nonmetal

Which property is most characteristic of metalloids?

• They are good thermal insulators
• They have properties of both metals and nonmetals
• They are highly malleable
• They readily form negative ions

Element \(34\) (Selenium) is classified as a:

• Metal
• Noble gas
• Metalloid
• Nonmetal

Which property is typically associated with metals?

• Poor electrical conductivity
• Forms negative ions
• High thermal conductivity
• Brittle texture

An element with atomic number \(32\) (Germanium) is classified as:

• Nonmetal
• Metalloid
• Noble gas
• Metal

Which characteristic is common to nonmetals?

• They tend to gain electrons
• They are usually good conductors
• They are typically malleable
• They have a metallic luster

Element \(16\) (Sulfur) is classified as:

• Metal
• Nonmetal
• Noble gas
• Metalloid

A key property of metals is:

• They are typically gases at room temperature
• They form cations easily
• They are poor heat conductors
• They are typically brittle

An element with atomic number \(51\) (Antimony) is classified as:

• Noble gas
• Metal
• Metalloid
• Nonmetal

Which property best describes metalloids?

• Their conductivity increases with temperature
• They are all gases at room temperature
• They readily form positive ions
• They have a dull appearance