Final answer:
To create 3-D models of molecules, you can use a molecular modeling kit or an online virtual kit like jmol. Use colored balls and sticks to represent each type of bonding, such as covalent or ionic bonding.
Step-by-step explanation:
To create 3-D models of molecules, you can use a molecular modeling kit or an online virtual kit like jmol. Start by finding the structural diagrams of the molecules you need to represent. Then, use colored balls and sticks to build the models, considering how to represent each type of bonding. For example, covalent bonding can be shown by connecting the balls with sticks, while ionic bonding may require constructing part of the crystal lattice.