Thursday, November 3, 2011

Lab 3.1 Modeling Molecules

I think that ionic bonds are stronger than covalent bonds. I believe this because the melting point for an ionic bond is stronger than a covalent bond. This indicates that more energy is required to break down the ionic bond.
When HCl is melted, it is experiencing a physical change. And thus, the compound is not being broken down in to separate Hydrogen and Chlorine atoms, it is simply changing phystical forms.
Melted ionic substances can conduct electricity because the molecules are free to move aroung and the electrons are less condensed. When an ionic substance is a solid state, the molecules are more compacted and do not move as freely as when in a liquid form.
Molecular substances do not conduct electricity because they are composed of only nonmetals, which are not good conductors of electricity.
Enrichment: A polar molecule is a molecule that has different charges at either end. Water molecules are polar because the Hydrogen end is positive, and the Oxygen end is negative. This effects how the molecules are arranged because the the opposite ends attract.
This diagram that I have created shows that the positive ends of the molecules attract to the negative ends of the other molecules, and vise versa.

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