Free to move.
Bendy, can shape it.
Can draw it out into a line.
Where are they found?
In the outer shell of atoms.
Metallic ion charge.
How're they formed?
A metal loses an electron.
Can you describe the structure?
Positive metal ions in a sea of negative, delocalised electrons.
How are they held together?
Strong electrostatic forces of attraction as the opposite charges attract.
What increases the bond strength?
Having more delocalised electrons.
What does the bond strength depend on?
- The charge of the ion and so the free electron number.
Example: Na+ Mg2+ Al3+
- Size of the ion (shielding)
Smaller = delocalsied electrons are closer to the nucleus, so feel the pull of the nucleus (nuclear charge) more. So have a stronger bond.
Name some properties of metals.
(8 in total)