Metallic bonding questions

Assignment: Questions on Topic 4.5: Metallic bonding

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Explain why graphite, an allotrope of the non-metal carbon, is a good conductor of electricity whereas diamond which is also an allotrope of carbon is a very poor conductor of electricity.

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i.  Define the term malleable.

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ii.  Explain why gold conducts electricity and is a malleable metal.

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Explain why the melting points of the alkali metals decrease as the atomic number of the metal increases.

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Tin, Sn, and lead, Pb, are both in group 14. Both are metals. Suggest one reason why lead, which has a higher atomic number than tin, has a higher melting point.

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The precise melting point of an alloy depends upon its exact composition. Stainless steel contains between 5 and 13% chromium. Suggest one reason why the melting point of stainless steel (1510 oC) is very similar to the melting point of steel (1425 - 1540 oC).

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