The blocks of the old auditorium are small and held together with mortar. The eight tonne slabs of the new building have an extended structure that is tied together tightly with steel rods.
Chemists have very specialised skills. Architects understand the materials they work with and the forces that hold them together. They can design structures that have never been built before. Architects have designed the new auditorium.
Chemists do exactly the same thing at the atomic, molecular or ionic level.
They can design new molecules with a specific purpose, to lower blood pressure, blood cholesterol or to conduct electricity like metals. Whether its quick drying paint that will protect the outside of your house for the next 10 years or an insecticide to kill the stink bugs munching happily in the vege garden a chemical architect will draw up a solution.
Chemical architects work with only three types of particle, atoms molecules and ions. The size and types of force between these particles determines many of their properties such as melting point, solubility and electrical conductivity.
In the structure and bonding topic you are constantly referring to three questions:
what are the particles (atoms ions or molecules)?
What are the forces holding these particles together (ionic covalent metallic or Van der Waals bonds)?
What are the properties (melting point, solubility and electrical conductivity)
With Van der Waals forces shapes of molecules, electronegativity and polarity are also important. Molecular shape can be predicted from Lewis diagrams and Lewis structures. That is just about everything?
Make sure that you understand everything in the video before moving on to the next section