Metallic Bonds and the Properties of Metals

Which pair of characteristics is most closely associated with metallic solids?

I. low melting point

II. high malleability

III. low thermal conductivity

IV. high electrical conductivity

• I and II

• I and III

• II and III

• II and IV

• III and IV

Explain how a metallic bond is similar to an ionic bond

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NGSS.HS-PS1-3

Explain why gold can be used in jewelry and as a conductor in electronic devices

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Select all correct statements

• Metals often form lattices in the solid state

• Metals cannot exist in the liquid state

• It is difficult to introduce other elements into the metallic crystal

• Alloys have properties that differ from the properties of the elements from which they were made

• All metals are malleable

The image shows :

• A substitutional alloy since the yellow atoms replaced the empty space between the blue atoms

• An interstitial alloy since the yellow atoms are the same size as the blue atoms

• A interstitial alloy since the yellow atoms filled the empty space between the blue atoms

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NGSS.HS-PS1-3

Electrons involved in metallic bonding are reffered to as ________ electrons

All uncharged atoms have valence electrons. Explain why elements such as iodine and sulfur do not have metallic bonds

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Using the periodic table only order calcium (Ca), potassium (K) and Aluminium (Al) from lowest to highest melting points

• K $<$ Ca $<$ Al

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NGSS.HS-PS1-1

Briefly explain why steel, an alloy of iron is used to build the supporting structure of many buildings

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Why do copper and zinc form a substitutional alloy and not an interstitial alloy

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