Bonds

There are 3 main types of bonds in chemistry

1. Ionic (metal to non-metal)
Electrons are transferred from metal to non-metal

2. Covalent (non-metal to non-metal)
Electrons are shared between non-metals

3. Last but not least, Metallic (metal)
Holds pure metals together by electrostatic attraction

Electronegativity (en) is a measure of an atom's attraction for electrons in a bond

Atoms with greater electronegativity attract electrons

Polar Covalent bonds form from an unequal sharing of electrons, a polar covalent bond is a bond between two non-metals with different electronegativities. Unsymmetrical molecules are usually polar.
Non-Polar covalent bonds form from equal sharing of electrons, and are symmetrical molecules.
The type of bond formed can be predicted by looking at the difference in electronegativity (en) of the elements



Here are some examples!


Predict the type of bond formed.


1. H- O

2.20 - 3.44 = 1.24
This bond between Hydrogen and Oxygen is a Polar Covalent bond!


2. K-F


3.99 - 0.82 = 3.17
This bond between potassium and fluorine is an Ionic bond!

Now that we went through some examples together, let's see if you can do some on your own!

QUIZ TIME!!!! (: