Bonding In Metals

An _____ is a mixture made of two or more elements that has properties of metal.

In every alloy, a least one of the elements is metal.

• true

• false

Why are alloys better to work with than pure metals?

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Answer explanation

Alloys are generally stronger and less likely to react with air or water than are pure metals.

Tags

NGSS.HS-ETS1-3

List physical property of an alloy that makes it useful is (more than one answer)

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Answer explanation

hardness, ductility, malleability, luster

What is a chemical property of alloys that make them useful (more than one answer)

• rust resistance

• high melting points

• high boiling points

• electrical conductivity

Why are alloys NOT compounds, but instead mixtures?

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Answer explanation

Physical processes can be used to separate the metals in an alloy.

The metals in an alloy do not react chemically.

A _______ ____ is an attraction between a psotive metal ion and the electrons surrounding it.

Describe the "sea of electrons"

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Answer explanation

The sea of electrons model describes how easy solid metals can change shape, their ability to conduct electric current, their luster and their ability to coduct heat.

Tags

NGSS.HS-PS2-5

Most metals are flexible and can be reshaped easily.

• true

• false

The ability to be bent easily and pulled into thin strands of wire is known as

• malleability

• ductility