1. Show the class pictures of five very different mammals, such as a cat, kangaroo, horse, rabbit, and monkey. Explain that all these animals are mammals, and that mammals constitute one class of the animal kingdom, which also includes other classes, such as reptiles, birds, and fish. Ask students what these five mammals have in common and mark their responses on a sheet of chart paper.
When ionic compounds are in a molten state or dissolved in water, forming an aqueous solution, the ions that formed the ionic compounds are able to move around freely, thus able to conduct electricity.
1 An ionic compound is a collection of an equal number of positive and negative ions arranged in a three-dimensional lattice. 2  Ionic compounds can be dissociated into their constituent ions with little effort. 3  Further they can be electrolyzed to produce elements or covalent molecules of the constituent atoms. Further they can be electrolyzed to produce elements or covalent molecules of the constituent atoms. 2  Water also weakens the attraction between the ions in an ionic compound. 3  This is why ionic compounds dissolve well in water. 4  Moreover ionic compounds can conduct electricity.