Types of Bonds

There are three main types of bonds:
1. IONIC (metal - non metal)
      - electrons are transferred from metal to non-metal
2. COVALENT (non-metal - metal)
      - electrons are shared between non metals
3. METALLIC (metal)
      - holds pure metals together by electrostatic attraction

Electronegativity(en)
- en is a measure of an atoms attraction for electrons in a bond
Flourine = 4.0
- atoms with greater en attract electrons more

polar covalent: bonds form from an un-equal sharing of electrons
non-plolar covalent: bonds form from equal sharing

BONDS:
- types of bonds formed can be predicted by looking at the difference in electronegativity of the elements
en > 1.7 = ionic bond
en< 1.7 = polar covalent bonds
en = 0   = non-polar covalent

for examples of electronegativity and bonding please watch the link below :)
http://www.youtube.com/watch?v=Kj3o0XvhVqQ

Nicole H