Metallic Bonding Flashcards

1
Q

What is metallic bonding.

A

The attraction between the positive metal ions and the sea of negative delocalised electrons which can move through the lattice.

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2
Q

Draw the arrangement of a metallic lattice.

A

In notes

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3
Q

How are electrons delocalised in a metallic structure.

A

When the atoms are close together, the valence electrons are delocalised and can move around the lattice.

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4
Q

What are the two factors that influence the strength of metallic bonding.

A

Charge of the ions
Size of the ions

(Metal)

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5
Q

How does charge of the metal ions affect the metallic bonding ?

A

The greater the charge of the ions, the greater the attraction between the actions and the sea of delocalised electrons. Therefore the stronger the lattice.

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6
Q

How does the size of metal ions affect the metallic bonding.

A

The smaller the metal ion, the closer the attraction between the metal ion nucleus and the sea of delocalised electrons therefore stronger lattice.

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7
Q

How would you get the maximum strength in a metallic structure ?

A

Small cations which are highly charged.

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8
Q

Draw a graph to show the meeting point of a metallic lattic across a period.

A

In notes

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9
Q

Draw a graph to show the trend of the melting points of metallic structures down a group.

A

In notes

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10
Q

What are the properties of metallic structures.

A

Malleable
Ductile
Conduct heat and electricity

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11
Q

Why are metallic structures malleable and ductile ?

A

If we beat a metal into another shape , the delocalised electron cloud continues to hold the shape together and the layers of cations can slide over eachother.

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12
Q

Why do metallic lattices conduct heat and electricity.

A

The electron cloud is mobile so electrons are free to move throughout the lattice. Electrons are attached to the positive current but are replaced by the negative current.

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13
Q

Explain why diamond can’t conduct electricity but graphite can

A

Diamond is a giant ionic lattice and is a solid - not enough movement of particles

Graphite has delocalised electrons which can travel through the substance to carry current.

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