There are billions of people on this earth and each is unique in their own way. The same goes for molecules and substances. There are billions of different molecules and substances on earth and each one has unique properties that make it what it is. When you look at some of the smallest features of things, molecular shape and intermolecular forces come into play. Molecular shape and intermolecular forces help determine what physical properties substances and objects have. Everyone plays a key role. Science can break down substances and determine what molecular shape and intermolecular forces have to do with physical properties. The molecular shape of a molecule has a lot to do with how it works and how it can be used. Molecular shape is the three-dimensional grouping of atoms that make up a molecule.1 It determines various properties of a substance. These include the color of the molecule, reactivity, biological activity, polarity, magnetism and phase of matter. To decide the shape of a molecule, it is necessary to draw the structure of the electronic Lewis dot. To be clear, though, the pattern of the Lewis dot does not determine the shape of a molecule. It is only the first part in determining the shape of a molecule. The Lewis dot drawing helps to identify the lone pairs and bond pairs of a molecule. Thus, with Lewis dot drawing, the theory of valence shell electron pair repulsion (VSPER) can be used to determine the molecular geometry and electronic group geometry of a molecule.2 It is important to know how to draw the Lewis structure of a molecule because everything else that will be stated is based on that. The Lewis dot structure cannot provide exact answers, but it is an essential guide to determining which... middle of paper......substance you are finding. This is because more energy is needed to break molecules apart. There are many different components that come into play when determining the physical properties of a substance. One of the ways physical properties can be predicted is by looking at the molecular shape and intermolecular forces of the molecule. Listed above are some of the many physical properties that can be determined. These included boiling and melting points, magnetism, vapor pressure, phases of matter, biological activity, polarity, color of the molecule, and reactivity. Scientists use molecular shape and intermolecular forces when looking at molecules because they can explain a lot about the molecule. Just as every person on this earth is unique, so are molecules and substances. This can be attributed to the physical properties that accompany them.