Types of bonding and properties

Cards (8)

Define metallic bonding
The electrostatic force between the metal cation and the delocalised electrons
How can the strength of the metallic bonding be increased ?  
-increase number of delocalised electrons per metal atom
-increasing the positive charge of the metal cations in the lattice
-decreasing the size of the metal ions
what are the characteristics of metallic bonding ?
malleable and ductile - layers of cations can Slide Over one another
conduct electricity - free-moving delocalised electrons
what happens to the melting point across a period  
increases - charge of cations increases, more delocalised electrons per cation.
what heppends to melting point down group?
decreases - distance between cation and delocalised electrons increases
What is the perfect ionic model
That ionic compounds are composed of perfectly spherical cations and anions arranged in a lattice
what is ionic bonding
electrostatic attraction between cations and anions (oppositely charged ions)
What is the trend of electronegativity across a period ?
Increases