Metallic Bonds and Alloys

Metallic Bonds and Alloys (TRIP)

Multiple Select

What are some properties of metals? (Tick all that apply)

• Dull

• High melting points

• Brittle

• Good Conductors

Multiple Choice

What is a use of transition metals?

• Wiring

• Catalysts

• Microchips

• Radiators

Multiple Select

Tick all that apply to Transition metals

• Form Coloured Compounds

• Low boiling points

• Form multiple positive ions.

• Expensive

Metallic bonds

• Metallic bonds form between 2 metal elements. Covalent is between 2 non-metals and Ionic is between one of each.

• They form a "sea of delocalised electrons" surrounding positive nuclei.

• These electrons are mobile and can therefore carry an electrical charge and heat from one end of the metal to the other.

• This is how they conduct.

Metallic bonds

• This lattice structure of atoms also forms layers.

• These layers can slide and overlap each other.

• This results in metals becoming Malleable - can be bent into any shape.

• They are also ductile - can be drawn out into extremely long thin lengths (think wires).

Multiple Select

Which of the following are Ionic?

• Sodium Chloride

• Sulphuric Acid (H2SO4)

• Magnesium Oxide

• Gold

• Carbon Dioxide

Multiple Select

Which of the following are Covalent?

• Sodium Chloride

• Sulphuric Acid (H2SO4)

• Magnesium Oxide

• Gold

• Carbon Dioxide

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Which of the following are Metallic?

• Sodium Chloride

• Sulphuric Acid (H2SO4)

• Magnesium Oxide

• Gold

• Carbon Dioxide

Multiple Select

Why are Alloys useful?

• They are prettier

• They are more expensive

• They are stronger and more durable

• They can have properties that are more useful than pure metals.

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What do metallic bonds form?

• Shared pair of electrons

• Opposite electrostatic bonds

• A delocalised "sea" of electrons

• Layers of Lattices.

Multiple Choice

What do covalent bonds form?

• Shared pair of electrons

• Opposite electrostatic bonds

• A delocalised "sea" of electrons

• Layers of Lattices.

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What do Ionic bonds form?

• Shared pair of electrons

• Opposite electrostatic bonds

• A delocalised "sea" of electrons

• Lattice structures

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What is a property unique to transition metals?

• High boiling points

• Can form coloured compounds

• Shiny

• Conducts electricity

• Can form multiple ions.

Multiple Select

What makes metals good for being used as frying pans?

• Good conductors of heat

• Heavy

• Good conductors of electricity

• Malleable

• Ductile

Multiple Select

What makes metals good for being used as wires?

• Good conductors of heat

• Heavy

• Good conductors of electricity

• Malleable

• Ductile