Metals, Nonmetals, Metalloids

Which of the following is a property of a non-metal?

• Conducts heat and electricity well

• Can be hammered into thin sheets

• Is brittle and breaks easily

• Has a shiny metallic luster

All of these properties describe metals EXCEPT

• malleable

• conductor

• brittle

• shiny

All of the following are properties used to classify elements as metals, non-metals, and metalloids EXCEPT

• texture

• conductivity

• luster

• malleability

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

• reflect light from its lustrous surface

• transfer thermal and electrical energy

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

• be hammered and rolled into thin sheets

Tags

NGSS.MS-PS3-5

NGSS.MS-PS1-4

Iron (Fe) is classified as a metal while Silicon (Si) is classified as a metalloid. Which physical property do these two elements most likely have in common? They both

• exist as gases at room temperature

• have a metallic shine or luster

• are brittle and shatter easily

• conduct electricity very well

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

• measure its conductivity

• determine its density

• find its melting point

• observe its color

Unlike non-metals, most metals tend to

• have less luster and shine

• break easily when hammered

• be gases at room temperature

• conduct heat and electricity well

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

Tags

NGSS.MS-PS3-5

A student tested the conductivity of four elements using an incomplete electrical circuit. When the element is placed in the circuit, the bulb lights up brightly, lights up dimly, or does not light up at all based on the element’s ability to conduct electricity. The table shows the results of her investigation. Based on the results of the conductivity test, which element is classified as a metal?

• Hydrogen

• Arsenic

• Krypton

• Copper

Tags

NGSS.MS-PS1-2

The table shows the physical properties of four elements. Which element is classified as a metalloid?

• Titanium

• Selenium

• Potassium

• Polonium