Metallic bonding - your questions, your answers!

Describe metallic bonding. 

• Positive protons arranged in regular lattice surrounded by a sea of delocalised electrons. There are strong forces of electrostatic attraction between the oppositely charged protons and electrons.

• Positive electrons arranged surrounded by a sea of delocalised ions. Strong forces of attraction between opposite charges

• A metallic bond is a type of chemical bond similar to a covalent bond. Atoms in metals are held together by forces caused by the valence electrons.

What are the properties of a malleable substance?

• Can be bent or reshaped under pressure 

• Can be made into wires

• Make a clanging sound when struck

• Useful for making cars

What is an alloy?

(a)  

What does the Electron Sea Model help explain?

• Conductivity

• Malleability

• Low Volatility

• Ductility

Suggest one reason why metals are good at conducting electricity

Explain why alloys allow different metals to bond together

(a)  

Give two reasons why the melting points of the metals from scandium to zinc vary in an abnormal fashion.

(a)  

Explain why solid ionic compounds are not good conductors and are brittle.

• made up of a giant molecular structure of positive metal ions and negative ions

• strong intermolecular forces

• When the lattice structure re-aligns, causing the different newly formed layers to repel each other as ions of the same charge repel each other.

• The electrons are delocalised and free to move

Describe the properties of the gold alloy in video 3.

What are the benefits of using Gold Alloy in jewellery as opposed to pure gold. 

(a)