Which term describes elements that are dense, good conductors of electricity and heat, are shiny and malleable, and are solid at room temperature?

Which term describes elements that are dense, good conductors of electricity and heat, are shiny and malleable, and are solid at room temperature?

• A. Nonmetals
• B. Metals
• C. Metalloids
• D. Noble Gases

Answer: (B)

Metals are dense, good conductors of electricity and heat, shiny, malleable, and solid at room temperature. These properties come from metallic bonding, where a sea of freely moving electrons surrounds positively charged ions. That electron mobility lets metals conduct heat and electricity efficiently and allows them to be bent or hammered without breaking, while polishing reveals a shiny surface. In contrast, nonmetals are often poor conductors and can be brittle or dull, metalloids have mixed traits, and noble gases are gases at room temperature and inert. So, the term that fits these characteristics is metals. Examples include copper, iron, and aluminum.

Metals are dense, good conductors of electricity and heat, shiny, malleable, and solid at room temperature. These properties come from metallic bonding, where a sea of freely moving electrons surrounds positively charged ions. That electron mobility lets metals conduct heat and electricity efficiently and allows them to be bent or hammered without breaking, while polishing reveals a shiny surface. In contrast, nonmetals are often poor conductors and can be brittle or dull, metalloids have mixed traits, and noble gases are gases at room temperature and inert. So, the term that fits these characteristics is metals. Examples include copper, iron, and aluminum.