Metallic bonds

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What are the two models that are used to explain metallic bonds?
1)Electron sea theory; 2) Bond theory
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What is electron sea theory used for and why does it fail?
Used to explain: conductivity and physical/mechanical properties = ductility,melting+boiling points. Fails: cannot explain variation of the physical properties e.g melting temperature
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What is Bond theory?
It is molecular theory applied to metals.
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How are conductance and valence bands created?
As #atoms increases(in the bond), the energy levels become so closely spaced that they form continuous bonds of occupied and unoccupied states. The bonding orbitals are occupied whilst the anti-bonding orbitals are empty creating the bands.
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How do metals get their lustre?
Photons are absorbed and are emitted by e on the metal surface.
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Other cards in this set

Card 2

Front

What is electron sea theory used for and why does it fail?

Back

Used to explain: conductivity and physical/mechanical properties = ductility,melting+boiling points. Fails: cannot explain variation of the physical properties e.g melting temperature

Card 3

Front

What is Bond theory?

Back

Preview of the front of card 3

Card 4

Front

How are conductance and valence bands created?

Back

Preview of the front of card 4

Card 5

Front

How do metals get their lustre?

Back

Preview of the front of card 5

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