Metallic Bonding Flashcards
When does metallic binding occurs?
within metals
What is metallic bonding?
Melatic binding the electrostatic attraction between a lattice of positive metal ions and a sea of delocalised electrons
What happens inside the metal?
Electrons have left the outer shell and are free to move about because they aren’t bonded
What does delocalized mean?
Delocalized means it hasn’t left the outer shell
What happens once they leave?
There is an electrostatic attraction between the sea of delocalized electrons and positive metal ions
What happens to the electrons when they leave?
They become positive
Why are metals good conductors of heat
Because atoms are tightly packed together and easily pass heat from one atom to another, also because they have delocalized electrons that can carry heat from one place to another
What is a lattice
A regular repeating pattern
Why d metals have high melting and boiling points?
They have a lot of energy to break the metallic bond
Why do atoms slide over each other
They have a regular reparting pattern
name two properties of metals
Mallebale and ductable
what is a propety of a pure metal
Soft
How do we make metals stronger
We make them alloys
What re metal alloys ?
They are a mixture of different metals with other elements e.g bronze,brass,steel
Why are alloys stronger than pure metals ?
Because they have different sized atoms which means it has an irregular arrangement that means the alloy slides and are harder and stronger than pure metals
