Metals, Nonmetals, and Metalloids Post Assessment

Which element is classified as a metalloid?

All of these properties describe metals EXCEPT —

• malleable.

• conductor.

• brittle.

• shiny.

Conductivity is a physical property of matter that describes its ability to —

• reflect light from its lustrous surface.

• transfer heat and electrical energy.

• exist in nature as a solid, liquid, or gas.

• be hammered and rolled into thin sheets.

Tags

NGSS.MS-PS1-4

What are the best headings for columns A, B, and C?

A= ​ (a)  

B= ​ ​ (b)  

C= ​ (c)  

• Metal
• Nonmetal
• Metalloid

Which of the following would help a student classify an unknown element as a metal, metalloid, or nonmetal?

• Measure its conductivity

• Determine its density

• Find its melting point

• Observe its color

Unlike nonmetals, most metals tend to —

• conduct electricity and heat well.

• be gases at room temperature.

• break easily when hammered.

• have less luster and shine.

Electrical wires are made from metals such as copper and chromium because -

• wires can be stretched and bent.

• most metals have a metallic luster.

• electricity flows in a complete circuit.

• metals are good conductors of electricity.

Which element most likely has a shiny luster?