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What is a metallic bond ?
The electrostatic attraction between cations and the sea of delocalised electrons.
High melting and boiling points
due to the strong electrostatic attractio between the sea of delocalised electrons and the cations there is a lot of energy needed to break the bonds.
Conductor of electricity
the sea of delocalised electrons are free to move around a strcutures meaning that they can carry a charge
Strength
The metals are strong because they have sliding layers of metallic ions which means they do not break . As well as the delocalised electrons are free to move around.
Density
They are denser than the lattices for ionic compounds they form crystals called grains.
Heat conductor
when the delocalised electrons get heated they gain kinetic energy as they do this they vibrate and the energy is spreas across the metal.
Ductile
They have layers and so are ductile meaning they can be easily drawn into wires.
Note 
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