C2.3.3 - Bulk Properties Of Materials Flashcards

1
Q

What does ‘brittle’ mean?

A

Hard but cracks or breaks under force

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2
Q

What does ‘malleable’ mean?

A

Something that can change shape without breaking or cracking

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3
Q

Are metals malleable or brittle?

A

Malleable

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4
Q

What happens to metal ions when an external force is applied to them?

A

The layers of metal ions slide over each other

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5
Q

Why are no bonds broken when an external force is applied to a metal?

A

The delocalised electrons are already free to move

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6
Q

What differences are there between brittle substance particles and malleable substance particles?

A

The particles in a malleable substances can change their positions in their specific structure easier

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7
Q

What can happen if a large enough force is applied to a giant covalent structure?

A

Many covalent bonds may break at once and cause the substance to snap

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8
Q

How strong are the intermolecular forces that attract simple and polymer molecules?

A

Weak (easily breakable)

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9
Q

If a solid is easily breakable and a lattice, what word would you use to describe it?

A

Brittle

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10
Q

How can a substance conduct electricity?

A

If it has charged particles that are free to move

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11
Q

In which states can metals conduct electricity?

A

Solid and Liquid

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12
Q

Why can simple molecules, most polymer molecules and giant covalent structures not conduct electricity?

A

They do not have delocalised electrons

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13
Q

When can ionic compounds conduct electricity?

A

When molten or in solution

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