The reactions of elements are related to the number of electrons in their outer shells: Atoms of metal elements give away electrons in their reactions to form positive ions. The ions formed have a ...

This leaves an area of positive charge in the desk near the plastic. The negative plastic and the positive area of the desk attract. When the balloon is rubbed on hair or clothes, electrons move onto ...

An electron is transferred from sodium to chlorine. Sodium becomes a positive ion and chlorine becomes a negative ion. The positive and negative ions attract each other and form the ionic compound ...