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.
The polarity of the water molecule causes an ionic compound to dissolve in water. The slightly negative oxygen atoms of the water molecules attract the positive ions, and the â¦ slightly positive hydrogen atoms of the water molecules attract the negative ions. This breaks the ionic bonds and the ions are surrounded by water molecules, preventing them from reforming ionic bonds.