Types of covalent bonding!


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  • Created by: Maryan
  • Created on: 07-01-12 23:07

Permanent dipole

Permanent dipole is when one atom is more electronegative than the other atom.


Because it has more protons and electrons and therefore a bigger attraction will happen as opposed to another atom who doesnt have many protons and electrrons.

E.g H-Cl

But whenever the dipoles are symetrical to each other e.g CH4(http://sciencenotes.files.wordpress.com/2010/11/ch4-structure.png)The dipoles act in different directions and cancel each other out!

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Van der waal forces

Van der waal forces

Weak intermolecular attraction between very small temporary dipoles in neighbouring moleculele

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Ice is less dense than water

Ice is less dense than water:

  • Ice has an open lattice with hydrogen bonds holding the water molecules apart.
  • When ice melts, the rigid hyrdogen bonds collapse so the h20 molecules move closer together.

High melting/boiling point:

  • Hydrogen bonds are stronger than any other molecular force
  • The hydrogen bonds are also elongated so more force is needed to break them apart
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