EXP13 Charging by Induction Hang a short piece of aluminum foil (about the width of the tape and half as long as your thumb) from a tape, with another piece of tape added to the bottom of the foil as a handle (Figure 14.64). Solution At the most fundamental level, the attractive electrical force between electrons and protons holds atoms together.electrical interactions between atoms are responsible for the formation of molecules. When two different substances are brought into contact, electrons may be transferred from one substance to another. When this occurs, the materials are said to be charged. The material that gains excess electrons is said to be negatively charged; the material with a deficit of electrons, positively charged. Neutral conductors can be charged by conduction if they come in contact with charged objects..