metals

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 below 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

Describe what luster means

• How an object reflects light
• How soft an object is
• If an object floats
• If an object can be dug out of the earth.

Each year, the science club puts on a science show for the students in the elementary school. Luis is planning demonstrations to show properties of metals. For one property, he decides to use a ball of pizza dough and a rolling pin.

Which property of metals is Luis most likely going to demonstrate using these materials

• luster

• opacity

• conductivity

• malleability

Metals are used in many products because of the characteristic properties that most metals share. Which properties of the metal tungsten make it useful in the thin, glowing filaments of light bulbs?

• Tungsten is ductile, and opaque.

• Tungsten is ductile, is malleable, and has a high luster.

• Tungsten is ductile, has a high melting point, and is electrically conductive.

• Tungsten has a high luster, has a low melting point, and is silver in color.

Tags

NGSS.MS-PS3-3

Metals are shiny, good conductors, malleable, and ductile.

• True

• False

Answer explanation

Metals are shiny because they reflect light. They are good conductors of electricity and heat because they have free electrons that can move easily through the metal. Metals are malleable, meaning they can be hammered or rolled into thin sheets without breaking. They are also ductile, meaning they can be drawn into thin wires without breaking.

When a metal can allow heat or electricity to flow through it, we say it is ___________.

• lustrous

• malleable

• ductile

• conductive

Tags

NGSS.MS-PS3-3

Which describes elements in the first group of the periodic table?

• alkali metals

• alkaline earth metals

• transition metals

• radioactive metals

Which of the following are physical properties of metal?

• luster

• malleable

• ductile

• conductor

• reactivity

Which of the following are chemical properties of metals?

• reactivity

• corrosion

• luster

• ductile

• conductors

Correctly label

a

b

doesn't change element

changes element when observed

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5