1. Metallic Bonds Main Concept:
Metallic bonding describes an array of positively charged metal cores surrounded by a sea of mobile valence electrons.

2. Metallic Bonding Metallic Bonds What they are / How they’re structured
Properties of Metals
Electric Conductivity
Malleability
Ductility
Volatility

3. - In metallic bonds, valence electrons from metal atoms are considered delocalized and not associated with any individual atom
- can be represented as array of positive metal ions with valence electrons drawn among them, as if electrons were moving (ie. a sea of electrons)

4. - electron sea model can explain several properties of metals, including:
- electrical conductivity: ability to conduct
electricity
- malleability: ability of solid to bend or be
hammered into other shapes without breaking
- ductility: ability of a material to be stretched
- low volatility: does not evaporate easily

5. - number of valence electrons involved in metallic bonding, via the shell model, can be used to understand patterns in these properties

6. Question:
How might an understanding of valence electrons explain the properties below for metals?
- electrical conductivity
- malleability
- ductility
- low volatility

7. - Metals are good conductors because delocalized electrons can easily flow through metals
- Metals are malleable and ductile because local bonds can easily be broken and reformed
-metals generally have strong attractive forces so they have low volatility